1
|
Theodorou SJ, Theodorou DJ, Kigka V, Gkiatas I, Fotopoulos A. DXA-based appendicular composition measures in healthy aging Caucasian Greek women: a cross-sectional study. Rheumatol Int 2024:10.1007/s00296-024-05622-4. [PMID: 38860993 DOI: 10.1007/s00296-024-05622-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 05/26/2024] [Indexed: 06/12/2024]
Abstract
As the global population of older persons increases, age-related medical conditions will have a greater impact on public health. DXA-derived bone and soft tissue metrics are associated with adverse clinical events in aging persons. This study aims to investigate the regional body composition of the appendices by whole-body DXA scans, and the age-related relationships between measures of bone and soft tissue in healthy Caucasian females of a Greek origin residing in the Mediterranean area. Body composition of the legs and the arms was analyzed, and lean mass (LM) and fat mass (FM) metrics were calculated in 330 women aged 20-85 years, using DXA. Peak bone mineral density (BMD) of the legs and arms was achieved between ages 20-30 and 41-50 years, respectively. The overall BMD reduction with age was for the legs 43% and the arms 32.2% (p < 0.001). Peak %LM of the legs and the arms was achieved between ages 20-30. The overall reduction of %LM with age was for the legs 22.5% (p < 0.001) and arms 6.6% (p < 0.05). Peak %FM of the legs and arms was attained between ages 31-40 and 61-70, respectively. The overall %FM reduction with age was for the legs and arms 7.5% and 1.9% (p > 0.05). In appendicular sites, Greek women reach peak values of bone mass in the legs first, in early adulthood. Bone loss predominates in the legs as women age. Also, with advancing age Greek women show preferential significant decreases of %LM and %FM in the legs as opposed to the arms. Although variation in appendicular bone and soft tissue metrics is present, the implications of variable biological crosstalks among the tissue components as women age may ultimately lay the foundation for future clinical trials aimed at healthy aging.
Collapse
Affiliation(s)
| | - Daphne J Theodorou
- Department of Radiology, General Hospital of Ioannina and National Healthcare System, Ioannina, Greece
| | - Vassiliki Kigka
- Department of Orthopaedic Surgery, University of Ioannina, Ioannina, Greece
| | - Ioannis Gkiatas
- Department of Orthopaedic Surgery, University of Ioannina, Ioannina, Greece
| | - Andreas Fotopoulos
- Department of Nuclear Medicine, University of Ioannina, Ioannina, Greece
| |
Collapse
|
2
|
Zhuang CL, Wu HF, Jiang HJ, Zhang FM, Shi HP, Yu Z, Shen X, Chen XL, Wang SL. Muscle attenuation, not skeletal muscle index, is an independent prognostic factor for survival in gastric cancer patients with overweight and obesity. Nutrition 2024; 122:112391. [PMID: 38460446 DOI: 10.1016/j.nut.2024.112391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 12/19/2023] [Accepted: 02/04/2024] [Indexed: 03/11/2024]
Abstract
OBJECTIVES Skeletal muscle index (SMI) is insufficient for evaluating muscle in obesity, and muscle attenuation (MA) may be a preferred indicator. This study aimed to investigate whether MA has greater prognostic value than SMI in gastric cancer patients with overweight and obesity. METHODS Clinical parameters of 1312 patients with gastric cancer who underwent radical gastrectomy were prospectively collected between 2013 and 2019. MA and SMI were analyzed by computed tomography scan. Overweight/obesity was defined as body mass index (BMI) ≥24 kg/m2. The hazard ratio (HR) for death was calculated using Cox regression analysis. RESULTS Among all patients, 405 were identified as overweight and obese, and 907 were identified as normal and underweight. MA was inversely associated with BMI and visceral fat area. Among the 405 patients with overweight and obesity, 212 patients (52%) were diagnosed with low MA. In the overweight/obese group, MA was an independent predictor for overall survival (HR, 1.610; P = 0.021) in multivariate Cox regression analyses, whereas SMI did not remain in the model. In the normal/underweight group, both low MA (HR, 1.283; P = 0.039) and low SMI (HR, 1.369; P = 0.008) were independent factors of overall survival. Additionally, 318 patients were identified as having visceral obesity in the overweight/obese group, and low MA was also an independent prognostic factor for survival in these patients (HR, 1.765; P = 0.013). CONCLUSION MA had a higher prognostic value than SMI in overweight and obese patients with gastric cancer after radical gastrectomy.
Collapse
Affiliation(s)
- Cheng-Le Zhuang
- Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hao-Fan Wu
- Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hao-Jie Jiang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Feng-Min Zhang
- Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Han-Ping Shi
- Department of Gastrointestinal Surgery and Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zhen Yu
- Department of Gastrointestinal Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xian Shen
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Xiao-Lei Chen
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Su-Lin Wang
- Department of Gastrointestinal Surgery, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China.
| |
Collapse
|
3
|
Yao L, Petrosyan A, Chaudhari AJ, Lenchik L, Boutin RD. Clinical, functional, and opportunistic CT metrics of sarcopenia at the point of imaging care: analysis of all-cause mortality. Skeletal Radiol 2024; 53:515-524. [PMID: 37684434 PMCID: PMC10841085 DOI: 10.1007/s00256-023-04438-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 08/23/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023]
Abstract
PURPOSE This study examines clinical, functional, and CT metrics of sarcopenia and all-cause mortality in older adults undergoing outpatient imaging. METHODS The study included outpatients ≥ 65 years of age undergoing CT or PET/CT at a tertiary care institution. Assessments included screening questionnaires for sarcopenia (SARC-F) and frailty (FRAIL scale), and measurements of grip strength and usual gait speed (6 m course). Skeletal muscle area (SMA), index (SMI, area/height2) and density (SMD) were measured on CT at T12 and L3. A modified SMI was also examined (SMI-m, area/height). Mortality risk was studied with Cox proportional hazard analysis. RESULTS The study included 416 patients; mean age 73.8 years [sd 6.2]; mean follow-up 2.9 years (sd 1.34). Abnormal grip, SARC-F, and FRAIL scale assessments were associated with higher mortality risk (HR [95%CI] = 2.0 [1.4-2.9], 1.6 [1.1-2.3], 2.0 [1.4-2.8]). Adjusting for age, higher L3-SMA, T12-SMA, T12-SMI and T12-SMI-m were associated with lower mortality risk (HR [95%CI] = 0.80 [0.65-0.90], 0.76 [0.64-0.90], 0.84 [0.70-1.00], and 0.80 [0.67-0.90], respectively). T12-SMD and L3-SMD were not predictive of mortality. After adjusting for abnormal grip strength and FRAIL scale assessments, T12-SMA and T12-SMI-m remained predictive of mortality risk (HR [95%CI] = 0.83 [0.70-1.00] and 0.80 [0.67-0.97], respectively). CONCLUSION CT areal metrics were weaker predictors of all-cause mortality than clinical and functional metrics of sarcopenia in our older patient cohort; a CT density metric (SMD) was not predictive. Of areal CT metrics, SMI (area/height2) appeared to be less effective than non-normalized SMA or SMA normalized by height1.
Collapse
Affiliation(s)
- Lawrence Yao
- Radiology and Imaging Sciences/CC/NIH, 10 Center Drive, Bethesda, MD, 20892, USA.
| | | | - Abhijit J Chaudhari
- University of California, Davis 4860 Y Street, Suite 3100, Sacramento, CA, 95817, USA
| | - Leon Lenchik
- Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
| | - Robert D Boutin
- Stanford University School of Medicine, 300 Pasteur Drive, MC-5105, Stanford, CA, 94305, USA
| |
Collapse
|
4
|
Kojima S, Usui N, Shigetake M, Uehata A, Inatsu A, Ando S, Matsuzawa R, Suzuki Y, Nakata J, Tsuchiya T, Hisadome H, Mawatari T, Tsubaki A. Intramuscular and abdominal fat measured by computed tomography and mortality of hemodialysis patients. Nephrol Dial Transplant 2024; 39:286-296. [PMID: 37458763 DOI: 10.1093/ndt/gfad169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND In hemodialysis patients, high body mass index is associated with low mortality while abdominal obesity relates to increased mortality. We aimed to investigate the association between muscle mass, intramuscular fat and abdominal fat measured by abdominal computed tomography (CT), and mortality in this patients population. METHODS This two-center retrospective cohort study included hemodialysis patients who underwent abdominal CT between January 2013 and December 2018. Skeletal muscle mass index (SMI), muscle radiation attenuation (MRA) as an index of intramuscular fat, and visceral fat to subcutaneous fat ratio (VSR) were calculated using CT images at the third lumbar vertebral level. Multivariate Cox proportional hazards model was used to determine the independent predictors of all-cause, cardiovascular and non-cardiovascular mortalities. RESULTS The study included 344 patients (median age 71.0 years; female 33.7%), among whom 145 died during a median follow-up of 4.9 years-46 and 99 from cardiovascular and non-cardiovascular causes, respectively. Lower MRA [hazard ratio (HR) 0.71, 95% confidence interval (CI) 0.58-0.87, P = .001] and higher VSR (HR 1.17, 95% CI 1.01-1.37, P = .04) were independently associated with higher all-cause mortality but not with lower SMI (HR 0.87, 95% CI 0.68-1.11, P = .26). Lower MRA (HR 0.51, 95% CI 0.35-0.73, P < .001) and higher VSR (HR 1.29, 95% CI 1.09-1.54, P = .003) were also associated with cardiovascular and non-cardiovascular mortality, respectively. CONCLUSIONS Intramuscular fat and abdominal fat as measured using abdominal CT in hemodialysis patients are stronger independent predictors of mortality than muscle mass.
Collapse
Affiliation(s)
- Sho Kojima
- Department of Rehabilitation, Kisen Hospital, Tokyo, Katsushika-ku, Japan
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata-city, Niigata, Japan
| | - Naoto Usui
- Department of Rehabilitation, Kisen Hospital, Tokyo, Katsushika-ku, Japan
- Department of Nephrology, Graduate School of Medicine, Juntendo University, Bunkyo-ku, Tokyo, Japan
| | - Masato Shigetake
- Department of Radiology, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Akimi Uehata
- Division of Cardiology, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Akihito Inatsu
- Division of Nephrology, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Shuji Ando
- Department of Information Sciences, Tokyo University of Science, Noda-city, Chiba, Japan
| | - Ryota Matsuzawa
- Department of Physical Therapy, School of Rehabilitation, Kobe-city, Hyogo Medical University, Hyogo, Japan
| | - Yusuke Suzuki
- Department of Nephrology, Graduate School of Medicine, Juntendo University, Bunkyo-ku, Tokyo, Japan
| | - Junichiro Nakata
- Department of Nephrology, Graduate School of Medicine, Juntendo University, Bunkyo-ku, Tokyo, Japan
| | - Takahiko Tsuchiya
- Division of Internal Medicine, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Hideki Hisadome
- Division of Cardiology, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Takayuki Mawatari
- Division of Internal Medicine, Kisen Hospital, Katsushika-ku, Tokyo, Japan
| | - Atsuhiro Tsubaki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata-city, Niigata, Japan
| |
Collapse
|
5
|
Oh E, Cho NJ, Kang H, Kim SH, Park HK, Kwon SH. Computed tomography evaluation of skeletal muscle quality and quantity in people with morbid obesity with and without metabolic abnormality. PLoS One 2023; 18:e0296073. [PMID: 38134035 PMCID: PMC10745145 DOI: 10.1371/journal.pone.0296073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
We investigated the differences in quantity and quality of skeletal muscle between metabolically healthy obese (MHO) and metabolically unhealthy obese (MUO) individuals using abdominal CT. One hundred and seventy-two people with morbid obesity who underwent bariatric surgery and 64 healthy control individuals participated in this retrospective study. We divided the people with morbid obesity into an MHO and MUO group. In addition, nonobese metabolic healthy people were included analysis to provide reference levels. CT evaluation of muscle quantity (at the level of the third lumbar vertebra [L3]) was performed by calculating muscle anatomical cross-sectional area (CSA), which was normalized to patient height to produce skeletal muscle index (SMI). Muscle quality was assessed as skeletal muscle density (SMD), which was calculated from CT muscle attenuation. To characterize intramuscular composition, muscle attenuation was classified into three categories using Hounsfield unit (HU) thresholds: -190 HU to -30 HU for intermuscular adipose tissue (IMAT), -29 to +29 HU for low attenuation muscle (LAM), and +30 to +150 HU for normal attenuation muscle (NAM). People with morbid obesity comprised 24 (14%) MHO individuals and 148 (86%) MUO individuals. The mean age of the participants was 39.7 ± 12.5 years, and 154 (65%) participants were women. MUO individuals had a significantly greater total skeletal muscle CSA than MHO individuals in the model that adjusted for all variables. Total skeletal muscle SMI, SMD, NAM index, LAM index, and IMAT index did not differ between MHO and MUO individuals for all adjusted models. Total skeletal muscle at the L3 level was not different in muscle quantity, quality, or intramuscular composition between the MHO and MUO individuals, based on CT evaluation. MHO individuals who are considered "healthy" should be carefully monitored and can have a similar risk of metabolic complications as MUO individuals, at least based on an assessment of skeletal muscle.
Collapse
Affiliation(s)
- Eunsun Oh
- Department of Radiology, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Nam-Jun Cho
- Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Korea
| | - Heemin Kang
- Department of Radiology, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Sang Hyun Kim
- Department of General Surgery, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Hyeong Kyu Park
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Soon Hyo Kwon
- Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea
| |
Collapse
|
6
|
Liguori ADAL, Fayh APT. Computed tomography: an efficient, opportunistic method for assessing body composition and predicting adverse outcomes in cancer patients. Radiol Bras 2023; 56:VIII-IX. [PMID: 38504810 PMCID: PMC10948160 DOI: 10.1590/0100-3984.2023.56.6e3-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024] Open
Affiliation(s)
- Adriano de Araújo Lima Liguori
- Radiologist for the Liga Norte Riograndense Contra o Câncer, Professor of Radiology at the Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil.
| | - Ana Paula Trussardi Fayh
- Associate Professor III in Nutrition at the Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN, Brazil
| |
Collapse
|
7
|
Erlandson KM, Umbleja T, Lu MT, Taron J, Ribaudo HJ, Overton ET, Presti RM, Haas DW, Sax PE, Yin MT, Zhai BK, Louis R, Upadhyay N, Eslami P, Douglas PS, Zanni MV, Fitch KV, Fulda ES, Fichtenbaum CJ, Malvestutto CD, Grinspoon SK, Brown TT. Associations of Muscle Density and Area With Coronary Artery Plaque and Physical Function. J Acquir Immune Defic Syndr 2023; 94:174-184. [PMID: 37368931 PMCID: PMC10527277 DOI: 10.1097/qai.0000000000003244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Accepted: 06/01/2023] [Indexed: 06/29/2023]
Abstract
OBJECTIVE Skeletal muscle quality and mass are important for maintaining physical function during advancing age. We leveraged baseline data from Randomized Trial to Prevent Vascular Events in HIV (REPRIEVE) to evaluate whether paraspinal muscle density and muscle area are associated with cardiac or physical function outcomes in people with HIV (PWH). METHODS REPRIEVE is a double-blind randomized trial evaluating the effect of pitavastatin for primary prevention of major adverse cardiovascular events in PWH. This cross-sectional analysis focuses on participants who underwent coronary computed tomography at baseline. Lower thoracic paraspinal muscle density (Hounsfield units [HU]) and area (cm 2 ) were assessed on noncontrast computed tomography. RESULTS Of 805 PWH, 708 had paraspinal muscle measurements. The median age was 51 years and 17% were natal female patients. The median muscle density was 41 HU (male) and 30 HU (female); area 13.2 cm 2 /m (male) and 9.9 cm 2 /m (female). In adjusted analyses, greater density (less fat) was associated with a lower prevalence of any coronary artery plaque, coronary artery calcium score >0, and high plaque burden ( P = 0.06); area was not associated with plaque measures. Among 139 patients with physical function measures, greater area (but not density) was associated with better performance on a short physical performance battery and grip strength. CONCLUSIONS Among PWH, greater paraspinal muscle density was associated with a lower prevalence of coronary artery disease while greater area was associated with better physical performance. Whether changes in density or area are associated with changes in CAD or physical performance will be evaluated through longitudinal analyses in REPRIEVE.
Collapse
Affiliation(s)
- Kristine M Erlandson
- Division of Infectious Diseases, Department of Medicine, University of Colorado-Anschutz Medical Campus, Aurora, CO
| | - Triin Umbleja
- Center for Biostatistics in AIDS Research, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Michael T Lu
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Jana Taron
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
- Faculty of Medicine, Department of Radiology, University of Freiburg Medical Center, University of Freiburg, Freiburg, Germany
| | - Heather J Ribaudo
- Center for Biostatistics in AIDS Research, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Edgar T Overton
- Division of Infectious Diseases, University of Alabama at Birmingham School of Medicine, Birmingham, AL
| | - Rachel M Presti
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - David W Haas
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN
- Department of Internal Medicine, Meharry Medical College, Nashville, TN
| | - Paul E Sax
- Division of Infectious Disease, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Michael T Yin
- Division of Infectious Diseases, Department of Internal Medicine, Columbia University Irving Medical Center, New York, NY
| | - Bingxue Kris Zhai
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Rochelle Louis
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Namrata Upadhyay
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Parastou Eslami
- Cardiovascular Imaging Research Center, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Pamela S Douglas
- Duke Clinical Research Institute, Duke University School of Medicine, Durham, NC
| | - Markella V Zanni
- Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Kathleen V Fitch
- Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Evelynne S Fulda
- Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Carl J Fichtenbaum
- Division of Infectious Diseases, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Carlos D Malvestutto
- Division of Infectious Diseases, Ohio State University Medical Center, Columbus, OH; and
| | - Steven K Grinspoon
- Metabolism Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA
| | - Todd T Brown
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD
| |
Collapse
|
8
|
da Rocha DS, Tessari JA, Mainardi NB, Hax V, Gasparin AA, de Oliveira CAV, Garcia TS, Xavier RM, Chakr RMDS. Assessment of muscle mass using chest computed tomography-based quantitative and qualitative measurements in patients with systemic sclerosis: A retrospective study with cross-sectional and longitudinal analyses. Semin Arthritis Rheum 2023; 59:152168. [PMID: 36736023 DOI: 10.1016/j.semarthrit.2023.152168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 01/03/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023]
Abstract
BACKGROUND/ PURPOSE Sarcopenia has been increasingly studied in systemic sclerosis (SSc), which is one of the most lethal autoimmune diseases, mainly due to lung involvement. Our objective was to study the associations of myopenia and/or myosteatosis with clinical features of SSc and subsequent adverse outcomes. METHODS This is a retrospective study with cross-sectional and longitudinal analyses, in which patients with SSc were consecutively included in the outpatient clinic of a tertiary university hospital between 2012 and 2021. Clinical and laboratory parameters of patients with SSc were collected from their medical records. Skeletal muscle mass was assessed on chest computed tomography (CT) at the level of the first lumbar vertebra (L1) by skeletal muscle area (SMA), skeletal muscle index ([SMI] SMA/height2), and skeletal muscle radiation attenuation (SMRA). Cut-off values for myopenia in women and men were SMA <70.1 cm² and <110.4 cm², and SMI <25.9 cm²/m² and <34.6 cm²/m², respectively; values for myosteatosis in women and men were SMRA <29.8 HU and <36.3 HU, respectively. In a subgroup of 31 patients followed-up between 2017 and 2019, the diagnostic properties of SMA, SMI, and SMRA by CT were compared with the appendicular skeletal muscle mass index (ASMI) by dual-energy X-ray absorptiometry (DXA). Low muscle quantity was defined according to the European Working Group on Sarcopenia in Older People 2: ASMI <5.5 kg/m2 in women and <7.0 kg/m2 in men. Afterwards, a better tomographic index was used for correlating with clinical and laboratory parameters. RESULTS Myopenia and/or myosteatosis were present in 75.7 % of patients with SSc. The prevalence rates according to each index were SMA 25.2%, SMI 12.1%, and SMRA 69.2%. In 73% of the patients with overweight/obesity (body mass index [BMI] ≥25 kg/m²), only SMRA was reduced. Considering ASMI as the gold standard, the sensitivity, specificity, positive and negative predictive values for SMA were 60%, 96.2%, 75% and 92.6%, respectively; for SMI, they were 40%, 96.2%, 66.7%, and 89.3%, respectively; for SMRA, these values were 60%, 34.6%, 15%, and 81.8%. Pearson's correlation coefficients were 0.73, 0.74, and 0.10 for SMA, SMI, and SMRA, respectively, and ASMI significantly agreed with SMA (kappa 0.611, p < 0.001) and SMI (kappa 0.431, p = 0.012). After adjustments in a multivariate model, BMI (p < 0.001) and female sex (p < 0.001) remained significantly associated with myopenia by SMA; BMI (p =0.010) remained significantly associated with low muscle mass by ASMI. CONCLUSION The SMA index at L1 level on chest CT was demonstrated to be an accurate measure that is useful for detecting myopenia in patients with SSc. BMI and male sex predicted low SMA and BMI was associated with low ASMI on DXA. STATEMENT OF CLINICAL SIGNIFICANCE In recent years, great advances have been made in sarcopenia-related research, resulting in broader knowledge on its definition, causes, diagnosis, and treatment options. Regarding the techniques used for assessing muscle composition, computed tomography (CT) was demonstrated by many studies to be an efficient and easy-to-use method that can be employed by professionals of different specialties, including rheumatologists. This study was able to demonstrate that although the L3 image was not present on CT, the analysis of SMA at the L1 level on chest CT proved to be an accurate and useful measure to detect myopenia in patients with SSc. This study identified some associated factors of myopenia and/or myosteatosis according to each method employed for assessing muscle composition. Reduced BMI and male sex were associated factors of myopenia when using SMA, and reduced BMI was associated with myopenia when employing ASMI by DXA. Finally, we highlight the need not to generalize the term "sarcopenia" in clinical studies assessing imaging parameters of body composition. The use of the terms myopenia and/or myosteatosis would be more adequate, because CT allows the assessment of muscle composition and not strength or physical performance.
Collapse
Affiliation(s)
- Daniela Silva da Rocha
- Rheumatology Service, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, RS 90035-903, Brazil; School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil.
| | - Julia Andressa Tessari
- School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | - Natalia Bocaccio Mainardi
- School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | - Vanessa Hax
- Rheumatology Service, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, RS 90035-903, Brazil; School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | - Andrese Aline Gasparin
- Rheumatology Service, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, RS 90035-903, Brazil; School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | | | - Tiago Severo Garcia
- School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | - Ricardo Machado Xavier
- Rheumatology Service, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, RS 90035-903, Brazil; School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| | - Rafael Mendonça da Silva Chakr
- Rheumatology Service, Hospital de Clínicas de Porto Alegre (HCPA), Rua Ramiro Barcelos, 2350, Porto Alegre, RS 90035-903, Brazil; School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), R. Ramiro Barcelos, 2400, Porto Alegre, RS 90035-003, Brazil
| |
Collapse
|
9
|
Dotan E, Catalano P, Lenchik L, Boutin R, Yao X, Marques HS, Ioffe D, Zhen DB, Li D, Wagner LI, Simon MA, Wong TZ, O'Dwyer PJ. The GIANT trial (ECOG-ACRIN EA2186) methods paper: A randomized phase II study of gemcitabine and nab-paclitaxel compared with 5-fluorouracil, leucovorin, and liposomal irinotecan in older patients with treatment-naïve metastatic pancreatic cancer - defining a new treatment option for older vulnerable patients. J Geriatr Oncol 2023; 14:101474. [PMID: 36963200 PMCID: PMC10425127 DOI: 10.1016/j.jgo.2023.101474] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 03/06/2023] [Indexed: 03/26/2023]
Abstract
INTRODUCTION Pancreatic cancer is the fourth leading cause of cancer-related death in the US with an increasing incidence in older adults (OA) over age 70. There are currently no treatment guidelines for OA with metastatic pancreatic cancer (mPCA) and selecting a chemotherapy regimen for these patients is subjective, based largely on chronologic age and performance status (PS). Geriatric screening tools provide a more objective and accurate evaluation of a patient's overall health but have not yet been validated in patient selection for mPCA treatment. This study aims to elucidate the optimal chemotherapy treatment of vulnerable OA with mPCA and understand the geriatric factors that affect outcomes in this population. METHODS/DESIGN The GIANT (ECOG-ACRIN EA2186) study is multicenter, randomized phase II trial enrolling patients over age 70 with newly diagnosed mPCA. This study utilizes a screening geriatric assessment (GA) which characterizes patients as fit, vulnerable, or frail. Patients with mild abnormalities in functional status and/or cognition, moderate comorbidities, or over age 80 are considered vulnerable. Enrolled patients are randomized to one of two dose-reduced treatment regimens (gemcitabine/nab-paclitaxel every other week, or dose-reduced 5-fluoruracil (5FU)/ liposomal irinotecan (nal-IRI) every other week). GA and quality of life (QoL) evaluations are completed prior to treatment initiation and at each disease evaluation. Overall survival (OS) is the primary endpoint, with secondary endpoints including progression free survival (PFS) and objective response rate (ORR). Enrolled patients will be stratified by age (70-74 vs ≥75) and ECOG PS (0-1 vs 2). Additional endpoints of interest for OA include evaluation of risk factors identified through GA, QoL evaluation, and toxicities of interest for older adults. Correlative studies include assessment of pro-inflammatory biomarkers of aging in the blood (IL-6, CRP) and imaging evaluation of sarcopenia as predictors of treatment tolerance. DISCUSSION The GIANT study is the first randomized, prospective national trial evaluating vulnerable OA with mPCA aimed at developing a tailored treatment approach for this patient population. This trial has the potential to establish a new way of objectively selecting vulnerable OA with mPCA for modified treatment and to establish a new standard of care in this growing patient population. TRIAL REGISTRATION This trial is registered with ClinicalTrial.gov Identifier NCT04233866.
Collapse
Affiliation(s)
- Efrat Dotan
- Department of Hematology and Oncology, Fox Chase Cancer Center, Temple University Health System, Philadelphia, PA, USA.
| | - Paul Catalano
- Dana Farber Cancer Institute - ECOG-ACRIN Biostatistics Center, Boston, MA, USA
| | - Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, USA
| | - Robert Boutin
- Department of Radiology, Stanford University School of Medicine, Palo Alto, CA, USA
| | - Xin Yao
- ThedaCare Regional Cancer Center-Appelton, WI, USA
| | - Helga S Marques
- Department of Biostatistics and Center for Statistical Sciences, Brown University, Providence, RI, USA
| | - Dina Ioffe
- Department of Hematology and Oncology, Fox Chase Cancer Center, Temple University Health System, Philadelphia, PA, USA
| | - David B Zhen
- Division of Medical Oncology, Department of Medicine, University of Washington, Seattle, WA, USA; Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Daneng Li
- Department of Medical Oncology & Therapeutics Research, City of Hope National Medical Center, Duarte, CA, USA
| | - Lynne I Wagner
- Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Melissa A Simon
- Department of Obstetrics and Gynecology, Center for Health Equity Transformation, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Terence Z Wong
- Department of Radiology, Division of Nuclear Medicine and Radiotheranostics, Duke University Medical Center, Durham, NC, USA
| | - Peter J O'Dwyer
- University of Pennsylvania and Abramson Cancer Center, Philadelphia, PA, USA
| |
Collapse
|
10
|
Lenchik L, Steinbach L, Boutin RD. Ageism in Society and Its Health Impact. AJR Am J Roentgenol 2023:1-2. [PMID: 36722760 DOI: 10.2214/ajr.22.28748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Ageism is an increasingly recognized form of cognitive bias involving stereotypes, prejudice, and discrimination directed toward people on the basis of their age. Age-based bias influences how medicine is practiced and can result in profoundly negative but avoidable health outcomes. Awareness and education regarding ageism and its manifestations can improve the ability to identify and mitigate ageism. As this Viewpoint describes, radiologists are well situated to be part of the solution in addressing ageism.
Collapse
Affiliation(s)
- Leon Lenchik
- Department of Radiology, Wake Forest University School of Medicine, Medical Center Blvd, Winston-Salem, NC 27157
| | - Lynne Steinbach
- Department of Radiology, University of California San Francisco School of Medicine, San Francisco, CA
| | - Robert D Boutin
- Department of Radiology, Stanford University School of Medicine, Stanford, CA
| |
Collapse
|
11
|
Ling M, Huang H, Li X, Xu Y, Fan Y. Extensive and Differential Deterioration of Hip Muscles May Preexist in Older Adults with Hip Fractures: Evidence from a Cross-Sectional Study. Calcif Tissue Int 2023; 112:328-337. [PMID: 36709468 DOI: 10.1007/s00223-022-01043-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 11/05/2022] [Indexed: 01/30/2023]
Abstract
Hip muscles play an increasingly important role in lower limb function with aging. Investigating the deterioration of hip muscles and its relationship with hip fracture (HF) may help identify older adults prone to fall. In this study, patients with fall-related HF within 48 h and non-fracture controls aged ≥ 60 years were enrolled. The cross-sectional area (size) and attenuation (density) of the hip flexors, extensors, adductors, and abductors were calculated after segmentation on computed tomography images. The correlation of muscle parameters with HF and age were evaluated using logistic and multiple regression, respectively. Discrimination of HF was analyzed by receiver-operating characteristic analyses. A total of 220 patients and 91 controls were included. The size of the flexors, extensors, and abductors, and the density of the flexors, adductors, and abductors were lower in patients with HF after adjustment for sex, age, and body mass index (BMI). However, decreased muscle size was only observed in hip extensors in patients aged 60-74 years. Decreased muscle size was associated with HF independent of sex, age, BMI, and hip trabecular bone mineral density. Abductor size exhibited a significantly larger negative correlation with age in patients compared to controls. Including abductor size or all muscle size was effective for discrimination of HF in patients aged ≥ 75 years. In conclusion, older adults with HF may have sustained extensive and differential hip muscle deterioration before the injury; extensor atrophy in younger-old age and consideration of a closer relationship between abductor size and age deserve attention.
Collapse
Affiliation(s)
- Ming Ling
- Department of Orthopaedics, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Hou Huang
- Department of Orthopaedics, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Xianlong Li
- Department of Orthopaedics, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yueyang Xu
- Department of Orthopaedics, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yongqian Fan
- Department of Orthopaedics, Huadong Hospital Affiliated to Fudan University, Shanghai, China.
| |
Collapse
|
12
|
Lee MH, Zea R, Garrett JW, Graffy PM, Summers RM, Pickhardt PJ. Abdominal CT Body Composition Thresholds Using Automated AI Tools for Predicting 10-year Adverse Outcomes. Radiology 2023; 306:e220574. [PMID: 36165792 PMCID: PMC9885340 DOI: 10.1148/radiol.220574] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/18/2022] [Accepted: 08/03/2022] [Indexed: 01/26/2023]
Abstract
Background CT-based body composition measures derived from fully automated artificial intelligence tools are promising for opportunistic screening. However, body composition thresholds associated with adverse clinical outcomes are lacking. Purpose To determine population and sex-specific thresholds for muscle, abdominal fat, and abdominal aortic calcium measures at abdominal CT for predicting risk of death, adverse cardiovascular events, and fragility fractures. Materials and Methods In this retrospective single-center study, fully automated algorithms for quantifying skeletal muscle (L3 level), abdominal fat (L3 level), and abdominal aortic calcium were applied to noncontrast abdominal CT scans from asymptomatic adults screened from 2004 to 2016. Longitudinal follow-up documented subsequent death, adverse cardiovascular events (myocardial infarction, cerebrovascular event, and heart failure), and fragility fractures. Receiver operating characteristic (ROC) curve analysis was performed to derive thresholds for body composition measures to achieve optimal ROC curve performance and high specificity (90%) for 10-year risks. Results A total of 9223 asymptomatic adults (mean age, 57 years ± 7 [SD]; 5152 women and 4071 men) were evaluated (median follow-up, 9 years). Muscle attenuation and aortic calcium had the highest diagnostic performance for predicting death, with areas under the ROC curve of 0.76 for men (95% CI: 0.72, 0.79) and 0.72 for women (95% CI: 0.69, 0.76) for muscle attenuation. Sex-specific thresholds were higher in men than women (P < .001 for muscle attenuation for all outcomes). The highest-performing markers for risk of death were muscle attenuation in men (31 HU; 71% sensitivity [164 of 232 patients]; 72% specificity [1114 of 1543 patients]) and aortic calcium in women (Agatston score, 167; 70% sensitivity [152 of 218 patients]; 70% specificity [1427 of 2034 patients]). Ninety-percent specificity thresholds for muscle attenuation for both risk of death and fragility fractures were 23 HU (men) and 13 HU (women). For aortic calcium and risk of death and adverse cardiovascular events, 90% specificity Agatston score thresholds were 1475 (men) and 735 (women). Conclusion Sex-specific thresholds for automated abdominal CT-based body composition measures can be used to predict risk of death, adverse cardiovascular events, and fragility fractures. © RSNA, 2022 Online supplemental material is available for this article. See also the editorial by Ohliger in this issue.
Collapse
Affiliation(s)
- Matthew H. Lee
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| | - Ryan Zea
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| | - John W. Garrett
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| | - Peter M. Graffy
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| | - Ronald M. Summers
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| | - Perry J. Pickhardt
- From the Departments of Radiology (M.H.L., R.Z., J.W.G., P.M.G.,
P.J.P.) and Medical Physics (J.W.G.), University of Wisconsin School of Medicine
and Public Health, 600 Highland Ave, Madison, WI 53792; and Imaging Biomarkers
and Computer-Aided Diagnosis Laboratory, Radiology and Imaging Sciences,
National Institutes of Health Clinical Center, Bethesda, Md (R.M.S.)
| |
Collapse
|
13
|
Flores LE, Beavers KM, Beavers DP, Greene KA, Madrid DA, Miller RM, Ard JD, Bilek LD, Weaver AA. Risedronate use may blunt appendicular lean mass loss secondary to sleeve gastrectomy: Results from a pilot randomized controlled trial. JCSM RAPID COMMUNICATIONS 2023; 6:18-25. [PMID: 37273449 PMCID: PMC10236921 DOI: 10.1002/rco2.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 09/22/2022] [Indexed: 06/06/2023]
Abstract
Background Despite robust weight loss and cardiometabolic benefit, lean mass loss following sleeve gastrectomy (SG) confers health risk. Bisphosphonates are a potential therapeutic agent for lean mass maintenance. Thus, our objective was to explore the effect of six months of risedronate (vs placebo) on change in dual energy x-ray absorptiometry (DXA) and computed tomography (CT) derived lean mass metrics in the year following SG. Methods 24 SG patients were randomized to six months of 150 mg oral risedronate or placebo capsules (NCT03411902). Body composition was assessed at baseline and six months with optional 12-month follow-up using whole-body DXA and CT at the lumbar spine and mid-thigh. Group treatment effects and 95% CIs were generated from a mixed model using contrast statements at six and 12 months, adjusted for baseline values. Results Of 24 participants enrolled [55.7±6.7 years (mean±SD), 79% Caucasian, 83% women, body mass index (BMI) 44.7±6.3kg/m2], 21 returned for six-month testing, and 14 returned for 12-month testing. Six-month weight loss was -16.3 kg (-20.0, -12.5) and -20.9 kg (-23.7, -18.1) in the risedronate and placebo groups, respectively (p=.057). Primary analysis at six-months revealed a non-significant sparing of appendicular lean mass in the risedronate group compared to placebo [-1.2 kg (-2.3, -0.1) vs -2.1 kg (-3.0, -1.2)]; p=.20. By 12-months, the risedronate group displayed no change in appendicular lean mass from baseline [-0.5 kg (-1.5, 0.6)]; however, the placebo group experienced significantly augmented loss [-2.9 kg (-3.6, -2.1)]. Conclusion Pilot data indicate risedronate treatment may mitigate appendicular lean mass loss following SG. Further study is warranted.
Collapse
Affiliation(s)
- Laura E. Flores
- College of Allied Health Professions, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kristen M. Beavers
- Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA
| | - Daniel P. Beavers
- Department of Biostatistics and Data Science, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Katelyn A. Greene
- Department of Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Diana A. Madrid
- Department of Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Ryan M. Miller
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Jamy D. Ard
- Department of Bariatric and Weight Management Center, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Laura D. Bilek
- College of Allied Health Professions, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ashley A. Weaver
- Department of Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, NC, USA
| |
Collapse
|
14
|
Gupta M, Lehl SS, Lamba AS. Ultrasonography for Assessment of Sarcopenia: A Primer. J Midlife Health 2022; 13:269-277. [PMID: 37324795 PMCID: PMC10266568 DOI: 10.4103/jmh.jmh_234_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/05/2023] [Accepted: 02/13/2023] [Indexed: 06/17/2023] Open
Abstract
The human skeletal muscle has a pivotal role in preserving health by maintaining mobility, balance, and metabolic homeostasis. Significant muscle loss as a part of aging and accelerated by disease leads to sarcopenia which becomes an important predictor of quality of life in older persons. Therefore, clinical screening for sarcopenia and validation by precise qualitative and quantitative measurement of skeletal muscle mass (MM) and function is at the center-stage of translational research. Many imaging modalities are available, each having their strengths and limitations, either in interpretation, technical processes, time constraints, or expense. B-mode ultrasonography (US) is a relatively novel approach to evaluating muscle. It can measure several parameters such as MM and architecture simultaneously including muscle thickness, cross-sectional area, echogenicity, pennate angle, and fascicle length. It can also evaluate dynamic parameters like muscle contraction force and muscle microcirculation. US has not gained global attention due to a lack of consensus on standardization and diagnostic threshold values to diagnose sarcopenia. However, it is an inexpensive and widely available technique with clinical applicability. The ultrasound-derived parameters correlate well with strength and functional capacity and provide potential prognostic information. Our aim is to present an update on the evidence-based role of this promising technique in sarcopenia, its advantages over the existing modalities, and its limitations in actual practice with the hope that it may emerge as the "stethoscope" for community diagnosis of sarcopenia.
Collapse
Affiliation(s)
- Monica Gupta
- Department of General Medicine, Government Medical College and Hospital, Chandigarh, India
| | - Sarabmeet Singh Lehl
- Department of General Medicine, Government Medical College and Hospital, Chandigarh, India
| | - Amtoj Singh Lamba
- Department of General Medicine, Government Medical College and Hospital, Chandigarh, India
| |
Collapse
|
15
|
Boutin RD, Houston DK, Chaudhari AS, Willis MH, Fausett CL, Lenchik L. Imaging of Sarcopenia. Radiol Clin North Am 2022; 60:575-582. [PMID: 35672090 DOI: 10.1016/j.rcl.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Sarcopenia is currently underdiagnosed and undertreated, but this is expected to change because sarcopenia is now recognized with a specific diagnosis code that can be used for billing in some countries, as well as an expanding body of research on prevention, diagnosis, and management. This article focuses on practical issues of increasing interest by highlighting 3 hot topics fundamental to understanding sarcopenia in older adults: definitions and terminology, current diagnostic imaging techniques, and the emerging role of opportunistic computed tomography.
Collapse
Affiliation(s)
- Robert D Boutin
- Department of Radiology, Stanford University School of Medicine, 453 Quarry Road, MC 5659, Palo Alto, CA 94304-5659, USA.
| | - Denise K Houston
- Gerontology and Geriatric Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA
| | - Akshay S Chaudhari
- Department of Radiology, Stanford University School of Medicine, Stanford, CA 94305-5372, USA; Department of Biomedical Data Science, Stanford University School of Medicine, Stanford, CA 94305-5372, USA
| | - Marc H Willis
- Department of Radiology, Stanford University School of Medicine, 300 Pasteur Drive, Room H1330A, Stanford, CA 94305-5642, USA
| | - Cameron L Fausett
- Department of Orthopaedic Surgery, Stanford University School of Medicine, 430 Broadway Street, Redwood City, CA 94063-6342, USA
| | - Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA
| |
Collapse
|
16
|
Qiao X, Hou G, Kang J, Wang QY, Yin Y. CT Attenuation and Cross-Sectional Area of the Pectoralis Are Associated With Clinical Characteristics in Chronic Obstructive Pulmonary Disease Patients. Front Physiol 2022; 13:833796. [PMID: 35721549 PMCID: PMC9205603 DOI: 10.3389/fphys.2022.833796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 04/20/2022] [Indexed: 12/01/2022] Open
Abstract
Purpose: Muscle wasting is associated with prognosis in patients with chronic obstructive pulmonary disease (COPD). Computed tomography (CT) could serve as a method for muscle assessment due to its ability to measure both muscle quantity (e.g., cross-sectional muscle area) and muscle quality (e.g., muscle attenuation). Our study aimed to compare the differences in CT-derived pectoralis muscle cross-sectional area (PMA) and pectoralis muscle attenuation (PMT) between COPD patients and healthy controls and explore the association between PMA and PMT measurements and clinical characteristics in patients with COPD. Methods: A total of 252 participants included in our analysis consisted of 80 healthy controls and 172 patients with COPD. PMA and PMT were measured from a single axial slice of the CT scan above the aortic arch. Linear regression analysis was used to determine the correlation between PMA and PMT measurements and clinical characteristics in patients with COPD. Associations were adjusted for age, sex, BMI, FEV1%pred, smoking pack-years, current smoking status, emphysema percentage, and total airway count (TAC) of the right upper lobe apical bronchus (RB1). Results: PMA and PMT were lower in COPD patients, especially those with acute exacerbation, than in healthy controls. PMA and PMT were significantly associated with the severity of emphysema and the TAC of RB1 (p < 0.05). Patients with stable COPD, who had lower PMA and lower PMT, had significantly worse pulmonary function, poorer exercise tolerance, decreased quality of life, and worse dyspnea scores. In addition, patients with acute COPD exacerbation, who had lower PMA and lower PMT, had a higher risk of respiratory failure on admission. Conclusion: CT-derived measurements of the pectoralis muscle may be helpful in detecting declines in muscle quantity and quality and predicting disease severity in patients with COPD.
Collapse
Affiliation(s)
- Xin Qiao
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Gang Hou
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, China
| | - Jian Kang
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Qiu-Yue Wang
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of China Medical University, Shenyang, China
- *Correspondence: Qiu-Yue Wang, ; Yan Yin,
| | - Yan Yin
- Department of Pulmonary and Critical Care Medicine, First Affiliated Hospital of China Medical University, Shenyang, China
- *Correspondence: Qiu-Yue Wang, ; Yan Yin,
| |
Collapse
|
17
|
Tagliafico AS, Rossi F, Bignotti B, Torri L, Bonsignore A, Belgioia L, Domineitto A. CT-derived relationship between low relative muscle mass and bone damage in patients with multiple myeloma undergoing stem cells transplantation. Br J Radiol 2022; 95:20210923. [PMID: 34918544 PMCID: PMC9153728 DOI: 10.1259/bjr.20210923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVE Sarcopenia or low muscle mass is related to worse prognosis in cancer patients. We investigated whether muscle mass is related to bone damage on CT in patients with multiple myeloma (MM). METHODS Approval from the institutional review board was obtained. N = 74 consecutive patients (mean age, 60.8 years ± 9.24 [standard deviation]; range, 36-89 years) for MM who underwent transplant were included. Sarcopenia cut-off points defined as skeletal muscle index (SMI) used were<41 cm2/m2. To assess bone damage in MM the MSBDS (myeloma spine and bone damage score) was used. One-way analysis of variance and the X2 test were used. Kaplan-Meier analysis was performed to generate progression and survival curves according to SMI and MSBDS. The testing level was set at 0.05. RESULTS The median SMI was 47.1 ± 14.2 and according to SMI 18/74 (24%) had sarcopenia which was more prevalent in females (p.001). A strong and significant association between patients with low muscle mass and elevated bone damage (24/74, 32.4%) and patients with normal/non-low muscle mass low bone damage (30/74, 40.5%) was present. Multiple Logistic regression did not show any significant relationship or confounding influence among SMI and MSBDS regarding sex (p.127), cytogenetic status (p.457), staging (p.756) and relapse (.126). Neither SMI nor MSBDS resulted significantly related to overall survival as shown in Kaplan-Meier analysis. CONCLUSION Sarcopenia and bone damage affected MM patients undergoing stem cell transplantation and are significantly associated. ADVANCES IN KNOWLEDGE Quantitative measurement of sarcopenia and bone damage on CT resulted present in MM patients undergoing stem cell transplantation and are significantly associated.
Collapse
Affiliation(s)
| | | | | | - Lorenzo Torri
- Vascular
Surgery Unit, Azienda Ospedaliero Universitaria Pisana,
Pisa, Italy
| | | | | | | |
Collapse
|
18
|
Manzano W, Lenchik L, Chaudhari AS, Yao L, Gupta S, Boutin RD. Sarcopenia in rheumatic disorders: what the radiologist and rheumatologist should know. Skeletal Radiol 2022; 51:513-524. [PMID: 34268590 DOI: 10.1007/s00256-021-03863-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 07/03/2021] [Accepted: 07/04/2021] [Indexed: 02/02/2023]
Abstract
Sarcopenia is defined as the loss of muscle mass, strength, and function. Increasing evidence shows that sarcopenia is common in patients with rheumatic disorders. Although sarcopenia can be diagnosed using bioelectrical impedance analysis or DXA, increasingly it is diagnosed using CT, MRI, and ultrasound. In rheumatic patients, CT and MRI allow "opportunistic" measurement of body composition, including surrogate markers of sarcopenia, from studies obtained during routine patient care. Recognition of sarcopenia is important in rheumatic patients because sarcopenia can be associated with disease progression and poor outcomes. This article reviews how opportunistic evaluation of sarcopenia in rheumatic patients can be accomplished and potentially contribute to improved patient care.
Collapse
Affiliation(s)
- Wilfred Manzano
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, 94305-5105, USA.
| | - Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, NC, 27157, USA
| | - Akshay S Chaudhari
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, 94305-5105, USA
| | - Lawrence Yao
- Department of Radiology, National Institute of Health, Bethesda, MD, 20892, USA
| | - Sarthak Gupta
- Department of Medicine, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Institutes of Health, Bethesda, MD, 20892, USA
| | - Robert D Boutin
- Department of Radiology, Stanford University School of Medicine, Stanford, CA, 94305-5105, USA
| |
Collapse
|
19
|
Choudhary S, Wadhawan M, Dhawan S, Ganesan PK, Mittal P, Sahney A, Kumar A. Normative values of skeletal muscle indices for nutritional assessment and implications on definition of sarcopenia in Indian adult population. Indian J Gastroenterol 2022; 41:69-76. [PMID: 35060085 DOI: 10.1007/s12664-021-01207-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/02/2021] [Indexed: 02/04/2023]
Abstract
INTRODUCTION Sarcopenia is defined as both low muscle function (performance or strength) and low muscle mass. Although aging is the main cause of sarcopenia, it can also occur due to poor nutrition and chronic diseases like liver cirrhosis, chronic kidney disease, and diabetes. OBJECTIVE To do the quantitative analysis of various normative skeletal muscle indices (to define sarcopenia) in the Indian population. METHODS Sex-specific means, standard deviations (SD), and sarcopenia cutoffs (mean-2SD) of psoas muscle thickness (PMTH), psoas muscle area (PMA), psoas muscle index (PMI), erector spinae muscle area (ESMA), skeletal muscle radiation attenuation (SMRA), total skeletal muscle area (SMA), and total skeletal muscle index (SMI) were computed. RESULTS A total of 2002 individuals (1308 males and 694 females) underwent CT evaluation. PMTH (mm/m) was observed to be 15.87±2.67 in males vs. 12.61±2.46 in females (p=0.0001); PMA (cm2) was 18.55±3.45 in males vs.13.52±2.80 in females (p=0.0001); PMI (cm2/m2) was 6.69±1.40 in males vs. 5.57±1.18 in females (p=0.0001); ESMA (cm2) was 45.74±6.01 in males vs. 35.37±5.63 in females (p=0.0001); ESMI (cm2/m2) was 16.5±2.55 in males vs. 14.62±2.6 in females (p=0.0001); SMRA was 55.80±3.91 Hounsfield unit (HU) in males vs. 52.36±3.67 HU in females (p=0.0001); SMA (cm2) was 147.73±11.77 in males vs. 106.33±12.00 in females (p=0.0001); and SMI (cm2/m2) was estimated to be 51.00±5.70 in males vs. 43.93±6.05 in females (p=0.0001). PMTH, PMI, ESMI, SMI, and SMRA cutoffs for sarcopenia at L3 were observed to be 10.53 mm/m, 3.89 cm2/m2, 11.40 cm2/m2, 39.59 cm2/m2, and 47.98 HU among males and 7.69, 3.20, 9.42, 31.83, and 45.01 among females, respectively; these values were consistent with previously reported cutoffs in Indian studies but not consistent with the cutoffs reported in other countries. CONCLUSION Normative values of skeletal muscle indices for either sex among the Indian adult population would enable future studies on sarcopenia in various medical conditions.
Collapse
Affiliation(s)
- Subham Choudhary
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India.
| | - Manav Wadhawan
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India
| | - Sugandha Dhawan
- St. Stephen's Hospital, Tis Hazari, New Delhi, 110 054, India
| | - Prem Kumar Ganesan
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India
| | - Payal Mittal
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India
| | - Amrish Sahney
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India
| | - Ajay Kumar
- Department of Radiodiagnosis, Dr. B. L. Kapur Memorial Hospital, Pusa Road, New Delhi, 110 005, India
| |
Collapse
|
20
|
Abstract
Sarcopenia indicates a loss of skeletal muscle mass, a condition that leads to a decline in physical performance. In 2018, the European Working Group on Sarcopenia in Older People met to update the original definition of sarcopenia: New scientific and clinical insights were introduced to emphasize the importance of muscle strength loss as a prime indicator of probable sarcopenia. In addition, the skeletal muscle is not only the organ related to mobility, but it is recognized as a secondary secretory organ too, with endocrine functions influencing several systems and preserving health. In this perspective, radiology could have a major role in early detection of sarcopenia and guarantee improvement in its treatment in clinical practice. We present here an update of clinical knowledge about sarcopenia and advantages and limitations of radiological evaluation of sarcopenia focusing on major body composition imaging modalities such as dual-energy X-ray absorptiometry, CT, and MRI. In addition, we discuss controversial such as the lack of consensus or standardization, different measurement methods, and diagnostic radiological cutoff points. Sarcopenia evaluation with radiological methods could enhance the role of radiologist in performing studies with relevant impact on medical and social outcome, placing radiology at the pinnacle of quality in evidence-based practice with high-level studies.
Collapse
|
21
|
Wang Y, Li S, Zhang Z, Sun S, Feng J, Chen J, Pei Y, Peng X. Accelerated loss of trunk muscle density and size at L1 vertebral level in male patients with COPD. Front Endocrinol (Lausanne) 2022; 13:1087110. [PMID: 36589831 PMCID: PMC9797585 DOI: 10.3389/fendo.2022.1087110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 11/28/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND AND PURPOSE Weight loss and muscle mass loss are common in patients with chronic obstructive pulmonary disease (COPD). Muscle density and fat infiltration based on CT images may be more sensitive than muscle mass by DXA in the assessment of sarcopenia for COPD patients. However, the age-related changes of cross-sectional trunk muscle compositions based on lung CT scans are still unknown. Thus, we aimed to investigate over time the change in muscle density, size, and fat deposition of L1-level trunk muscles in patients with COPD. MATERIALS AND METHODS 129 male COPD patients with a second chest CT scan (from 2013-2019 to 2014-2020) were enrolled. The CT images at first and second CT scans are analyzed by OsiriX software. Trunk muscles at the level of the 1st lumbar vertebrae were selected for analysis. Attenuation of lumbar vertebrae 1 was also measured from chest CT images. The pulmonary function values were calculated based on forced expiratory volume in 1 second (FEV1) and forced vital capacity (FVC). RESULTS The mean age of the 129 patients with COPD was 69.7 years. The durations of COPD of this cohort were from 8-17 years. The mean area and density of L1 trunk muscles were 85.5 cm2 and 36.4 HU. At baseline, muscle area and density and vertebral density were negatively associated with age (p<0.0001), while the intermuscular fat area and the fat infiltration ratio were not significantly associated with age (p>0.05). The per-year loss of trunk muscle area was 2.83 cm2 (p<0.0001) which accounts for 3.3% decrease per year, and the per-year decrease of trunk muscle density was 2.41 HU (p<0.0001) which accounts for 6.6% decrease per year. The per-year increase of intermuscular fat in trunk muscles was 0.57 cm2 (p=0.006) which accounts for 11.1% increase per year. The bone density loss was 5.63 HU/per year (p<0.0001). CONCLUSION Men with COPD had accelerated muscle loss as well as increased fat infiltration. Compared to muscle quantity loss, the decline in muscle quality is much larger, indicating the importance of relevant interventions focusing on improving muscle quality.
Collapse
Affiliation(s)
- Ying Wang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Sidong Li
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Zhenyi Zhang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
- Department of Radiology, Taojiang County People’s Hospital, Yiyang, China
| | - Shiqi Sun
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Juntao Feng
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, China
| | - Jinbiao Chen
- Department of Medical Records & Information, Central South University, Changsha, China
| | - Yigang Pei
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
| | - Xianjing Peng
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha, China
- *Correspondence: Xianjing Peng,
| |
Collapse
|
22
|
Jammy GR, Boudreau RM, Miljkovic I, Sharma PK, Reddy SP, Greenspan SL, Newman AB, Cauley JA. Peripheral bone structure, geometry, and strength and muscle density as derived from peripheral quantitative computed tomography and mortality among rural south Indian older adults. PLOS GLOBAL PUBLIC HEALTH 2022; 2:e0000333. [PMID: 36962497 PMCID: PMC10022329 DOI: 10.1371/journal.pgph.0000333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 07/08/2022] [Indexed: 11/05/2022]
Abstract
Multiple studies have observed a relationship of bone mineral density (BMD) measured by Dual energy X-ray absorptiometry (DXA) and mortality. However, areal BMD (aBMD) measured by DXA is an integrated measure of trabecular and cortical bone and does not measure the geometry of bone. Peripheral Quantitative Computed Tomography (pQCT) provides greater insights on bone structure, geometry and strength. To examine whether higher bone phenotypes and muscle density as measured by pQCT are associated with a lower all-cause mortality, we studied 245 men and 254 women (all age >60) recruited in the Mobility and Independent Living among Elders Study in rural south India. Cox proportional hazards models estimated hazard ratios (HR [95% Confidence Intervals]). After an average follow-up of 5.3 years, 73 men and 50 women died. Among men, trabecular volumetric bone mineral density (vBMD) of radius (HR per SD increase in parameter = 0.59 [0.43, 0.81]) and tibia (0.60[0.45, 0.81]), cortical vBMD of radius (0.61, [0.47, 0.79]) and tibia (0.62, [0.49, 0.79]), cortical thickness of radius (0.55, [0.42, 0.7]) and tibia (0.60, [0.47, 0.77]), polar strength strain index (SSIp) of tibia (0.73 [0.54, 0.98]), endosteal circumference of radius (1.63, [1.25, 2.12]) and tibia (1.54, [1.19, 1.98]) were associated with all-cause mortality. Muscle density (0.67, [0.51, 0.87]) was associated with lower mortality in men. Among women cortical vBMD of radius (0.64, [0.47, 0.87]) and tibia (0.60 [0.45, 0.79]), cortical thickness of radius (0.54, [0.37, 0.79]) and tibia (0.43, [0.30, 0.61]), SSIp of radius (0.70 [0.48,1.01]) and tibia (0.58 [0.37, 0.90]) and endosteal circumference of radius (1.33 [0.97, 1.82]) and tibia (1.83, [1.37, 2.45]) were associated with all-cause mortality. Among men, gait speed mediated the association of muscle density and mortality but there was no mediation for any bone parameters. Conclusion: pQCT bone measures and muscle density were independently associated with mortality among rural south Indian elders.
Collapse
Affiliation(s)
- Guru Rajesh Jammy
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- SHARE INDIA-Mediciti Institute of Medical Sciences, Medchal District, Telangana, India
| | - Robert M Boudreau
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Iva Miljkovic
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Pawan Kumar Sharma
- SHARE INDIA-Mediciti Institute of Medical Sciences, Medchal District, Telangana, India
| | - Sudhakar Pesara Reddy
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- SHARE INDIA-Mediciti Institute of Medical Sciences, Medchal District, Telangana, India
| | - Susan L Greenspan
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| |
Collapse
|
23
|
Jung YW, Hong N, Na JC, Han WK, Rhee Y. Computed Tomography-Derived Skeletal Muscle Radiodensity Is an Early, Sensitive Marker of Age-Related Musculoskeletal Changes in Healthy Adults. Endocrinol Metab (Seoul) 2021; 36:1201-1210. [PMID: 34897260 PMCID: PMC8743594 DOI: 10.3803/enm.2021.1206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 10/11/2021] [Accepted: 11/01/2021] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND A decrease in computed tomography (CT)-derived skeletal muscle radiodensity (SMD) reflects age-related ectopic fat infiltration of muscle, compromising muscle function and metabolism. We investigated the age-related trajectory of SMD and its association with vertebral trabecular bone density in healthy adults. METHODS In a cohort of healthy adult kidney donors aged 19 to 69 years (n=583), skeletal muscle index (SMI, skeletal muscle area/height2), SMD, and visceral-to-subcutaneous fat (V/S) ratio were analyzed at the level of L3 from preoperative CT scans. Low bone mass was defined as an L1 trabecular Hounsfield unit (HU) <160 HU. RESULTS L3SMD showed constant decline from the second decade (annual change -0.38% and -0.43% in men and women), whereas the decline of L3SMI became evident only after the fourth decade of life (-0.37% and -0.18% in men and women). One HU decline in L3SMD was associated with elevated odds of low bone mass (adjusted odds ratio, 1.07; 95% confidence interval, 1.02 to 1.13; P=0.003), independent of L3SMI, age, sex, and V/S ratio, with better discriminatory ability compared to L3SMI (area under the receiver-operating characteristics curve 0.68 vs. 0.53, P<0.001). L3SMD improved the identification of low bone mass when added to age, sex, V/S ratio, and L3SMI (category-free net reclassification improvement 0.349, P<0.001; integrated discrimination improvement 0.015, P=0.0165). CONCLUSION L3SMD can be an early marker for age-related musculoskeletal changes showing linear decline throughout life from the second decade in healthy adults, with potential diagnostic value for individuals with low bone mass.
Collapse
Affiliation(s)
| | - Namki Hong
- Division of Endocrinology, Endocrine Research Institute, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Joon Chae Na
- Department of Urology, Yonsei University College of Medicine, Seoul, Korea
| | - Woong Kyu Han
- Department of Urology, Yonsei University College of Medicine, Seoul, Korea
| | - Yumie Rhee
- Division of Endocrinology, Endocrine Research Institute, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
24
|
Jing X, Tan L, Fu H, Yang L, Yang M. Associations of ADL Disability With Trunk Muscle Mass and Muscle Quality Indicators Measured by Opportunistic Chest Computed Tomography Imaging Among Older Inpatients. Front Med (Lausanne) 2021; 8:743698. [PMID: 34778305 PMCID: PMC8581194 DOI: 10.3389/fmed.2021.743698] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/05/2021] [Indexed: 02/05/2023] Open
Abstract
Objectives: Sarcopenia is an important predictor of dependence in activities of daily living (ADL disability); however, the association between muscle quality and ADL disability has not been established. We aimed (1) to assess the feasibility of measuring trunk muscle mass and muscle quality by chest CT images; and (2) to explore the possible associations of ADL disability with these muscle mass and muscle quality indicators among older inpatients. Methods: We included older patients in an acute care ward. ADL disability was defined as the Barthel Index (BI) score ≤ 60 points. Unenhanced chest CT images at the 12th thorax (T12) vertebral level were used to segment skeletal muscle area (SMA) and intermuscular adipose tissue (IMAT) and to measure the mean skeletal muscle radiodensity (SMD). Skeletal muscle index (SMI), the muscle mass indicator, was calculated by SMA (cm2)/body height squared (m2). The percentage of IMAT (IMAT%) was calculated using the equation: IMAT% = IMAT/(SMA+ IMAT) ×100%. Skeletal muscle radiodensity, IMAT, and IMAT% were the muscle quality indicators. Kendall's tau rank correlation coefficients (τ) were calculated to explore the correlations. Univariate and multivariate logistic regression models were performed to calculate odds ratios (OR) and 95% confidence interval (CI). Results: We included 212 participants. Skeletal muscle index and SMD were positively and significantly associated with the BI score (τ = 0.14 and 0.31, respectively, both P < 0.001); whereas IMAT and IMAT% were negatively and significantly associated with the BI score (τ = -0.21, P < 0.001; τ = -0.21, P < 0.012). After adjusting for confounders, SMI (adjusted OR 1.03, 95% CI 0.97-1.09) was not independently associated with ADL disability; however, SMD (adjusted OR 0.94, 95% CI 0.88-0.99), IMAT (adjusted OR 1.11, 95% CI 1.03-1.20), and IMAT% (adjusted OR 1.09, 95% CI 1.02-1.16) were independently associated with ADL disability. Subgroup analysis found similar results in men; however, none of these indicators were independently associated with ADL disability in women. Conclusion: Trunk muscle quality indicators (SMD, IMAT, and IMAT%) measured by chest CT images, but not SMI, are independently associated with ADL disability in a single-center study population of older inpatients, especially in men. Further research is necessary to validate our findings.
Collapse
Affiliation(s)
- Xiaofan Jing
- Department of Clinical Nutrition, West China Hospital, Sichuan University, Chengdu, China
| | - Lingling Tan
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Hongbo Fu
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Ling Yang
- Outpatient Department, West China Hospital, Sichuan University, Chengdu, China
| | - Ming Yang
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
25
|
Tan L, Ji G, Bao T, Fu H, Yang L, Yang M. Diagnosing sarcopenia and myosteatosis based on chest computed tomography images in healthy Chinese adults. Insights Imaging 2021; 12:163. [PMID: 34743259 PMCID: PMC8572237 DOI: 10.1186/s13244-021-01106-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/05/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Measuring muscle mass and muscle quality based on chest Computed Tomography (CT) images would facilitate sarcopenia and myosteatosis research. We aimed (1) to measure muscle mass and myosteatosis based on chest CT images at the 12th thoracic vertebra level and compare the relevant indicators with whole-body skeletal muscle mass (BSM) and whole-body fat mass (BFM) measured by bioelectrical impedance analysis; and (2) to determine the cut-off points of these indicators for diagnosing sarcopenia or myosteatosis in healthy Chinese adults. METHODS Chest CT images were analyzed using a segmentation software. Skeletal muscle area (SMA), skeletal muscle radiodensity (SMD), and intermuscular adiposity tissue (IMAT) were measured. Skeletal muscle indices (SMIs) and IMAT/SMA ratio were calculated. RESULTS We included 569 participants. SMA, SMA/height2, and SMA/BMI were strongly and positively correlated with BSM (r = 0.90, 0.72, and 0.69, respectively, all p < 0.001); whereas SMA/weight was moderately and positively correlated with BSM (r = 0.38, p < 0.001). IMAT and IMAT/SMA were strongly and positively correlated with BFM (r = 0.67 and 0.58, respectively, both p < 0.001). SMD was moderately and negatively correlated with BFM (r = - 0.40, p < 0.001). We suggest SMA/height2 (< 25.75 cm2/m2 in men and < 20.16 cm2/m2 in women) for diagnosing sarcopenia and SMD (< 37.42 HU in men and < 33.17 HU in women) or IMAT (> 8.72 cm2 in men and > 4.58 cm2 in women) for diagnosing myosteatosis. CONCLUSIONS Muscle mass indicators (SMA and SMIs) and muscle quality indicators (SMD, IMAT, and IMAT/SMA) measured by chest CT images are valuable for diagnosing sarcopenia and myosteatosis, respectively.
Collapse
Affiliation(s)
- Lingling Tan
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Guiyi Ji
- Health Management Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ting Bao
- Health Management Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Hongbo Fu
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ling Yang
- Outpatient Department, West China Hospital, Sichuan University, No 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
| | - Ming Yang
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
- National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, No 37 Guoxue Lane, Chengdu, 610041, Sichuan, China.
- Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| |
Collapse
|
26
|
Chen X, Xiang H, Tan L, Zhou J, Tang J, Hu X, Yang M. Psoriasis Is Associated With Myosteatosis but Not Sarcopenia: A Case-Control Study. Front Med (Lausanne) 2021; 8:754932. [PMID: 34722590 PMCID: PMC8554055 DOI: 10.3389/fmed.2021.754932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Accepted: 09/21/2021] [Indexed: 02/05/2023] Open
Abstract
Background: The link between psoriasis and body fat (or obesity) has been well established. However, there are no reports detailing the possible relationship between psoriasis and fat infiltration in skeletal muscle, also known as myosteatosis. A recent study reported the possible association between psoriasis, arthritis, and sarcopenia (the loss of skeletal muscle mass or function). The present study aimed to explore the possible associations of chronic plaque psoriasis with myosteatosis and sarcopenia. Methods: We conducted a case-control study. In-patients with chronic plaque psoriasis were retrospectively recruited. Healthy controls were prospectively and continuously recruited. Unenhanced cross-sectional chest computed tomography images at the 12th thoracic vertebral level were analyzed using Mimics software. Skeletal muscle area (SMA), skeletal muscle radiodensity (SMD), and intermuscular adiposity tissue (IMAT) were measured. The skeletal muscle index (SMI) was calculated as SMA/height2. The percentage of IMAT (IMAT%) was calculated as IMAT/SMA × 100%. Myosteatosis was defined by SMD or IMAT%, whereas sarcopenia was defined by SMI. Propensity score matching was performed to adjust for the main confounders. Logistic regression models were used to evaluate the associations of psoriasis with myosteatosis and sarcopenia. Results: We included 155 psoriasis patients and 512 healthy controls. After propensity score matching, we retained 310 controls. The prevalence of sarcopenia was not significantly different between the psoriasis and control groups (men: 9.8% vs. 14.4%, p = 0.244; women: 7.0% vs. 11.7%, p = 0.548). Psoriasis patients were more prone to SMD-defined myosteatosis (men: 39.3% vs. 20.8%; women: 46.5% vs. 16.0%; both p < 0.001) and IMAT%-defined myosteatosis (men: 21.4% vs. 12.5%, p = 0.034; women: 46.5 vs. 28.7%, p = 0.042) than the control group. After adjustment for potential confounders, psoriasis was not significantly associated with sarcopenia (odds ratio [OR] 0.51, 95% confidence interval [CI] 0.25–1.19, p = 0.136). However, psoriasis was associated with SMD-defined myosteatosis (OR 3.16, 95% CI 1.86–5.37, p < 0.001) and IMAT%-defined myosteatosis (OR 1.76, 95% CI 1.04–3.00; p = 0.037). Conclusions: Chronic plaque psoriasis is independently associated with myosteatosis but not sarcopenia. Since fat and muscle are considered endocrine organs and can drive the inflammatory process, further studies detailing the interaction between psoriasis, fat, and skeletal muscle are warranted.
Collapse
Affiliation(s)
- Xiaomei Chen
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Hongmei Xiang
- Department of Dermatology, West China Hospital, Sichuan University, Chengdu, China
| | - Lingling Tan
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Jie Zhou
- Health Management Center, West China Hospital, Sichuan University, Chengdu, China
| | - Jing Tang
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | - Xiaoyi Hu
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,Health Management Center, West China Hospital, Sichuan University, Chengdu, China
| | - Ming Yang
- Center of Gerontology and Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China.,Precision Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
27
|
Cawthon PM, Blackwell T, Cummings SR, Orwoll ES, Duchowny KA, Kado DM, Stone KL, Ensrud KE, Cauley JA, Evans WJ. Muscle Mass Assessed by the D3-Creatine Dilution Method and Incident Self-reported Disability and Mortality in a Prospective Observational Study of Community-Dwelling Older Men. J Gerontol A Biol Sci Med Sci 2021; 76:123-130. [PMID: 32442245 DOI: 10.1093/gerona/glaa111] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Whether low muscle mass is a risk factor for disability and mortality is unclear. Associations between approximations of muscle mass (including lean mass from dual-energy x-ray absorptiometry [DXA]), and these outcomes are inconsistent. METHODS Muscle mass measured by deuterated creatine (D3Cr) dilution and appendicular lean mass (ALM, by DXA) were assessed at the Year 14 Visit (2014-2016) of the prospective Osteoporotic Fractures in Men study (N = 1,425, age 77-101 years). Disability in activities of daily living (ADLs), instrumental ADLs, and mobility tasks was self-reported at the Year 14 visit and 2.2 years later; deaths were centrally adjudicated over 3.3 years. Relative risks and 95% confidence intervals (CI) were estimated per standard deviation decrement with negative binomial, logistic regression, or proportional hazards models. RESULTS In age- and clinical center-adjusted models, the relative risks per decrement in D3Cr muscle mass/wgt was 1.9 (95% CI: 1.2, 3.1) for incident self-reported ADL disability; 1.5 (95% CI: 1.3, 1.9) for instrumental ADL disability; and 1.8 (95% CI: 1.5, 2.2) for mobility disability. In age-, clinical center-, and weight-adjusted models, the relative risks per decrement in D3Cr muscle mass was 1.8 (95% CI: 1.5, 2.2) for all-cause mortality. In contrast, lower DXA ALM was not associated with any outcome. Associations of D3Cr muscle mass with these outcomes were slightly attenuated after adjustment for confounding factors and the potentially mediating effects of strength and physical performance. CONCLUSIONS Low muscle mass as measured by D3Cr dilution is a novel risk factor for clinically meaningful outcomes in older men.
Collapse
Affiliation(s)
- Peggy M Cawthon
- Research Institute, California Pacific Medical Center, San Francisco.,Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Terri Blackwell
- Research Institute, California Pacific Medical Center, San Francisco
| | - Steven R Cummings
- Research Institute, California Pacific Medical Center, San Francisco.,Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Eric S Orwoll
- Department of Medicine, Oregon Health and Science University, Portland
| | - Kate A Duchowny
- Department of Epidemiology and Biostatistics, University of California, San Francisco
| | - Deborah M Kado
- Department of Family Medicine and Public Health, University of California, San Diego.,Department of Internal Medicine, University of California, San Diego
| | - Katie L Stone
- Research Institute, California Pacific Medical Center, San Francisco
| | - Kristine E Ensrud
- Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minnesota.,Division of Epidemiology and Community Health, University of Minnesota, Minneapolis
| | - Jane A Cauley
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pennsylvania
| | - William J Evans
- Department of Nutrition Sciences, University of California, Berkeley.,Department of Medicine, Duke University, Durham, North Carolina
| |
Collapse
|
28
|
Ruby L, Sanabria SJ, Saltybaeva N, Frauenfelder T, Alkadhi H, Rominger MB. Comparison of ultrasound speed-of-sound of the lower extremity and lumbar muscle assessed with computed tomography for muscle loss assessment. Medicine (Baltimore) 2021; 100:e25947. [PMID: 34032704 PMCID: PMC8154376 DOI: 10.1097/md.0000000000025947] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 04/23/2021] [Indexed: 01/04/2023] Open
Abstract
To compare the speed of propagation of ultrasound (US) waves (SoS) of the lower leg with the clinical reference standard computed tomography (CT) at the level of lumbar vertebra 3 (L3) for muscle loss assessment. Both calf muscles of 50 patients scheduled for an abdominal CT were prospectively examined with ultrasound. A plexiglas-reflector located on the opposite side of the probe with the calf in between was used as a timing reference for SoS (m/s). CT measurements were performed at the level of L3 and included area (cm2) and attenuation (HU) of the psoas muscle, abdominal muscles, subcutaneous fat, visceral fat and abdominal area. Correlations between SoS, body mass index (BMI) and CT were determined using Pearson's correlation coefficient. Based on reported CT sarcopenia threshold values, receiver operating characteristic (ROC) analysis was performed for SoS. Inter-examiner agreement was assessed with the median difference, inter-quartile range (IQR) and intraclass correlation coefficients. SoS of the calf correlated moderately with abdominal muscle attenuation (r = 0.48; P < .001), psoas muscle attenuation (r = 0.40; P < .01), abdominal area (r = -0.44; P < .01) and weakly with subcutaneous fat area (r = -0.37; P < .01). BMI correlated weakly with psoas attenuation (r = -0.28; P < .05) and non-significantly with abdominal muscle attenuation. Normalization with abdominal area resulted in moderate correlations with abdominal muscle area for SoS (r = 0.43; P < .01) and BMI (r = -0.46; P < .001). Based on sarcopenia threshold values for skeletal muscle attenuation (SMRA), area under curve (AUC) for SoS was 0.724. Median difference between both examiners was -3.4 m/s with IQR = 15.1 m/s and intraclass correlation coefficient = 0.794. SoS measurements of the calf are moderately accurate based on CT sarcopenia threshold values, thus showing potential for muscle loss quantification.
Collapse
Affiliation(s)
- Lisa Ruby
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Sergio J. Sanabria
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
- Deusto Institute of Technology, University of Deusto/IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Natalia Saltybaeva
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Thomas Frauenfelder
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Hatem Alkadhi
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| | - Marga B. Rominger
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zürich, Switzerland
| |
Collapse
|
29
|
Farsijani S, Xue L, Boudreau RM, Santanasto AJ, Kritchevsky SB, Newman AB. Body composition by computed tomography vs. dual energy x-ray absorptiometry: Long-term prediction of all-cause mortality in the Health ABC cohort. J Gerontol A Biol Sci Med Sci 2021; 76:2256-2264. [PMID: 33835154 DOI: 10.1093/gerona/glab105] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Body composition assessment by computed tomography (CT) predicts health outcomes in diverse populations. However, its performance in predicting mortality has not been directly compared to dual-energy-X-ray-absorptiometry (DXA). Additionally, the association between different body compartments and mortality, acknowledging the compositional nature of human body, is not well-studied. Compositional Data Analysis, that is applied to multivariate proportion-type dataset, may help to account for the inter-relationships of body compartments by constructing log-ratios of components. Here, we determined the associations of baseline CT-based measures of mid-thigh cross-sectional areas vs. DXA measures of body composition with all-cause mortality in Health ABC cohort, using both traditional (individual body compartments) and Compositional Data Analysis (using ratios of body compartments) approaches. METHODS The Health ABC study assessed body composition in 2911 older adults in 1996-97. We investigated the individual and ratios of (by Compositional Analysis) body compartments assessed by DXA (lean, fat, and bone-mass) and CT (muscle, subcutaneous fat area, intermuscular fat (IMF), and bone) on mortality, using Cox proportional hazard models. RESULTS Lower baseline muscle area by CT (HRmen=0.56 [95%CI: 0.48-0.67], HRwomen=0.60 [0.48-0.74]), fat-mass by DXA (HRmen=0.48 [0.24-0.95]) were predictors of mortality in traditional Cox-regression analysis. Consistently, Compositional Data Analysis revealed that lower muscle area vs. IMF, muscle area vs. bone area, and lower fat-mass vs. lean-mass were associated with higher mortality in both sexes. CONCLUSION Both CT measure of muscle area and DXA fat-mass (either individually or relative to other body compartments) were strong predictors of mortality in both sexes in a community research setting.
Collapse
Affiliation(s)
- Samaneh Farsijani
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.,Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA
| | - Lingshu Xue
- Health Policy and Management; Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pittsburgh, PA
| | - Robert M Boudreau
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.,Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA
| | - Adam J Santanasto
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.,Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA
| | - Stephen B Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Wake Forest School of Medicine, Winston-Salem, NC
| | - Anne B Newman
- Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA.,Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA
| |
Collapse
|
30
|
Figueiredo P, Marques EA, Gudnason V, Lang T, Sigurdsson S, Jonsson PV, Aspelund T, Siggeirsdottir K, Launer L, Eiriksdottir G, Harris TB. Computed tomography-based skeletal muscle and adipose tissue attenuation: Variations by age, sex, and muscle. Exp Gerontol 2021; 149:111306. [PMID: 33713735 DOI: 10.1016/j.exger.2021.111306] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 02/17/2021] [Accepted: 03/06/2021] [Indexed: 01/04/2023]
Abstract
OBJECTIVE This study aimed to investigate how skeletal muscle attenuation and adipose tissue (AT) attenuation of the quadriceps, hamstrings, paraspinal muscle groups and the psoas muscle vary according to the targeted muscles, sex, and age. DESIGN Population-based cross-sectional study. SETTING Community-dwelling old population in Reykjavik, Iceland. SUBJECTS A total of 5331 older adults (42.8% women), aged 66-96 years from the Age, Gene/Environment Susceptibility (AGES)- Reykjavik Study, who participated in the baseline visit (between 2002 and 2006) and had valid thigh and abdominal computed tomography (CT) scans were studied. METHODS Muscle attenuation and AT attenuation of the quadriceps, hamstrings, paraspinal muscle groups and the psoas muscle were determined using CT. Linear mixed model analysis of variance was performed for each sex, with skeletal muscle or AT attenuation as the dependent variable. RESULTS Muscle attenuation decreased, and AT attenuation increased with age in both sexes, and these differences were specific for each muscle, although not in all age groups. Age-related differences in muscle and AT attenuation varied with specific muscle. In general, for both sexes, skeletal muscle attenuation of the hamstrings declined more than average with age. Men and women displayed a different pattern in the age differences in AT attenuation for each muscle. CONCLUSIONS Our data support the hypotheses that skeletal muscle attenuation decreases, and AT attenuation increases with aging. In addition, our data add new evidence, supporting that age-related differences in skeletal muscle and AT attenuation vary between muscles.
Collapse
Affiliation(s)
- Pedro Figueiredo
- Laboratory of Epidemiology and Population Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Research Center in Sports Sciences, Health Sciences and Human Development - CIDESD, University Institute of Maia - ISMAI, Maia, Portugal; Portugal Football School, Portuguese Football Federation, Oeiras, Portugal.
| | - Elisa A Marques
- Laboratory of Epidemiology and Population Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA; Research Center in Sports Sciences, Health Sciences and Human Development - CIDESD, University Institute of Maia - ISMAI, Maia, Portugal
| | - Vilmundur Gudnason
- Icelandic Heart Association Research Institute, Kópavogur, Iceland; University of Iceland, Reykjavik, Iceland
| | - Thomas Lang
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA
| | | | | | - Thor Aspelund
- Icelandic Heart Association Research Institute, Kópavogur, Iceland; Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Kristin Siggeirsdottir
- Icelandic Heart Association Research Institute, Kópavogur, Iceland; Janus Rehabilitation, Reykjavik, Iceland
| | - Lenore Launer
- Laboratory of Epidemiology and Population Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | | | - Tamara B Harris
- Laboratory of Epidemiology and Population Science, Intramural Research Program, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
31
|
Diagnosing sarcopenia at the point of imaging care: analysis of clinical, functional, and opportunistic CT metrics. Skeletal Radiol 2021; 50:543-550. [PMID: 32892227 DOI: 10.1007/s00256-020-03576-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/30/2020] [Accepted: 08/06/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine the relationship between CT-derived muscle metrics and standardized metrics of sarcopenia in patients undergoing routine CT imaging. MATERIALS AND METHODS Data collected in 443 consecutive patients included body CT, grip strength, usual gait speed, and responses to SARC-F and FRAIL scale questionnaires. Functional and clinical metrics of sarcopenia were acquired at the time of CT. Metrics were analyzed using the diagnostic framework of the European Working Group on Sarcopenia in Older People (EWGSOP2). The skeletal muscle index (SMI) and skeletal muscle density (SMD) were measured at the T12 and L3 levels. Statistical methods include linear prediction models and ROC analysis. RESULTS T12-SMD and L3-SMD in women and T12-SMD and L3-SMI in men show weak but significant (p < 0.05) predictive value for gait speed, after adjusting for subject age and body mass index. The prevalence of abnormal CT SMI at T12 and L3 was 29% and 71%, respectively, corresponding to prevalences of confirmed sarcopenia by EWGSOP2 of 10% and 15%, respectively. The agreement of abnormal SARC-F and FRAIL scale screening and EWGSOP2 confirmed sarcopenia was slight to fair (kappa: 0.20-0.28). CT cutpoints, based on EWGSOP2 criteria for abnormal grip strength or gait speed, are generally lower than cutpoints based on normative population data. CONCLUSION Collection of clinical and functional sarcopenia information at the point of imaging care can be accomplished quickly and safely. CT-derived muscle metrics show convergent validity with gait speed. Only a minority of subjects with low CT metrics have confirmed sarcopenia by EWGSOP2 definition.
Collapse
|
32
|
Romanowski KS, Fuanga P, Siddiqui S, Lenchik L, Palmieri TL, Boutin RD. Computed Tomography Measurements of Sarcopenia Predict Length of Stay in Older Burn Patients. J Burn Care Res 2021; 42:3-8. [PMID: 32841333 DOI: 10.1093/jbcr/iraa149] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Sarcopenia and frailty are associated with aging. In older burn patients, frailty has been associated with mortality and discharge disposition, but sarcopenia has not been examined. This study aims to investigate the relationship between frailty and computed tomography (CT)-derived sarcopenia with length of stay and mortality in older burn patients. Burn patients ≥60 years old admitted between 2008 and 2017 who had chest or abdomen CT scans within 1 week of admission were evaluated. Frailty was assessed using the Canadian Study of Health and Aging Clinical Frailty Scale (CFS). Sarcopenia was assessed on CT exams by measuring skeletal muscle index (SMI) of paraspinal muscles at T12 and all skeletal muscles at L3. The relationship between frailty scores and SMI with length of stay (LOS) and mortality was determined using logistic regression. Eighty-three patients (59 men; mean age 70.2 ± 8.5 years) had chest (n = 50) or abdomen (n = 60) CT scans. Mean TBSA = 14.3 ± 14.0%, LOS = 25.8 ± 21.3 days, CFS = 4.36 ± 0.99. Sixteen patients (19.3%) died while in the hospital. CT-derived measurement of SMI at T12 was significantly associated with LOS (P < .05), but not with mortality (P = .561). CT-derived metrics at L3 were not significantly associated with outcomes. CFS was not associated with LOS (P = .836) or mortality (P = .554). In older burn patients, low SMI of the paraspinal muscles at T12 was associated with longer LOS.
Collapse
Affiliation(s)
- Kathleen S Romanowski
- Department of Surgery, Division of Burn Surgery, University of California, Davis, Sacramento
| | - Praman Fuanga
- Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Ratchathewi, Bangko, Thailand
| | | | - Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Tina L Palmieri
- Department of Surgery, Division of Burn Surgery, University of California, Davis, Sacramento
| | - Robert D Boutin
- Department of Radiology, Stanford University School of Medicine, California
| |
Collapse
|
33
|
Lenchik L, Barnard R, Boutin RD, Kritchevsky SB, Chen H, Tan J, Cawthon PM, Weaver AA, Hsu FC. Automated Muscle Measurement on Chest CT Predicts All-Cause Mortality in Older Adults From the National Lung Screening Trial. J Gerontol A Biol Sci Med Sci 2021; 76:277-285. [PMID: 32504466 PMCID: PMC7812435 DOI: 10.1093/gerona/glaa141] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Muscle metrics derived from computed tomography (CT) are associated with adverse health events in older persons, but obtaining these metrics using current methods is not practical for large datasets. We developed a fully automated method for muscle measurement on CT images. This study aimed to determine the relationship between muscle measurements on CT with survival in a large multicenter trial of older adults. METHOD The relationship between baseline paraspinous skeletal muscle area (SMA) and skeletal muscle density (SMD) and survival over 6 years was determined in 6,803 men and 4,558 women (baseline age: 60-69 years) in the National Lung Screening Trial (NLST). The automated machine learning pipeline selected appropriate CT series, chose a single image at T12, and segmented left paraspinous muscle, recording cross-sectional area and density. Associations between SMA and SMD with all-cause mortality were determined using sex-stratified Cox proportional hazards models, adjusted for age, race, height, weight, pack-years of smoking, and presence of diabetes, chronic lung disease, cardiovascular disease, and cancer at enrollment. RESULTS After a mean 6.44 ± 1.06 years of follow-up, 635 (9.33%) men and 265 (5.81%) women died. In men, higher SMA and SMD were associated with a lower risk of all-cause mortality, in fully adjusted models. A one-unit standard deviation increase was associated with a hazard ratio (HR) = 0.85 (95% confidence interval [CI] = 0.79, 0.91; p < .001) for SMA and HR = 0.91 (95% CI = 0.84, 0.98; p = .012) for SMD. In women, the associations did not reach significance. CONCLUSION Higher paraspinous SMA and SMD, automatically derived from CT exams, were associated with better survival in a large multicenter cohort of community-dwelling older men.
Collapse
Affiliation(s)
- Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Ryan Barnard
- Department of Biostatistics and Data Science, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Robert D Boutin
- Department of Radiology, Stanford University Medical Center, California
| | - Stephen B Kritchevsky
- Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Haiying Chen
- Department of Biostatistics and Data Science, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Josh Tan
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, San Francisco
| | - Ashley A Weaver
- Department of Biomedical Engineering, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Fang-Chi Hsu
- Department of Biostatistics and Data Science, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina
| |
Collapse
|
34
|
Value-Added Opportunistic CT: Insights Into Osteoporosis and Sarcopenia. AJR Am J Roentgenol 2020; 215:582-594. [DOI: 10.2214/ajr.20.22874] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
35
|
Incidental Vascular Calcifications on CT in Young Patients. Acad Radiol 2020; 27:1063-1064. [PMID: 32359928 DOI: 10.1016/j.acra.2020.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 03/26/2020] [Indexed: 11/24/2022]
|
36
|
Huber FA, Del Grande F, Rizzo S, Guglielmi G, Guggenberger R. MRI in the assessment of adipose tissues and muscle composition: how to use it. Quant Imaging Med Surg 2020; 10:1636-1649. [PMID: 32742957 DOI: 10.21037/qims.2020.02.06] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Body composition analysis based on the characterization of different tissue compartments is currently experiencing increasing attention by a broad range of medical disciplines for both clinical and research questions. However, body composition profiling (BCP) can be performed utilizing different modalities, which all come along with several technical and diagnostic strengths and limitations, respectively. Magnetic resonance imaging (MRI) demonstrates good soft tissue resolution, high contrast between fat and water, and is free from ionizing radiation. This review article represents an overview of imaging techniques for body composition assessment, focussing on qualitative and quantitative methods of assessing adipose tissue and muscles in MRI.
Collapse
Affiliation(s)
- Florian Alexander Huber
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| | - Filippo Del Grande
- Istituto di imaging della Svizzera Italiana, Regional Hospital of Lugano, Lugano, Switzerland
| | - Stefania Rizzo
- Istituto di imaging della Svizzera Italiana, Regional Hospital of Lugano, Lugano, Switzerland
| | | | - Roman Guggenberger
- Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland
| |
Collapse
|
37
|
Amini B, Boyle SP, Boutin RD, Lenchik L. Approaches to Assessment of Muscle Mass and Myosteatosis on Computed Tomography: A Systematic Review. J Gerontol A Biol Sci Med Sci 2020; 74:1671-1678. [PMID: 30726878 DOI: 10.1093/gerona/glz034] [Citation(s) in RCA: 170] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND/OBJECTIVE There is increasing use of computed tomography (CT) in sarcopenia research using a wide variety of techniques. We performed a systematic review of the CT literature to identify the differences between approaches used. METHODS A comprehensive search of PubMed from 1983 to 2017 was performed to identify studies that used CT muscle measurements to assess muscle mass and myosteatosis. The CT protocols were evaluated based on anatomic landmark(s), thresholding, muscle(s) segmented, key measurement (ie, muscle attenuation, cross-sectional area, volume), derived variables, and analysis software. From the described search, 657 articles were identified and 388 studies met inclusion criteria for this systematic review. RESULTS Muscle mass was more commonly assessed than myosteatosis (330 vs. 125). The most commonly assessed muscle or muscle groups were total abdominal wall musculature (142/330 and 49/125 for muscle mass and myosteatosis, respectively) and total thigh musculature (90/330 and 48/125). The most commonly used landmark in the abdomen was the L3 vertebra (123/142 and 45/49 for muscle mass and myosteatosis, respectively). Skeletal muscle index and intermuscular adipose tissue were the most commonly used measures of abdominal wall muscle mass (114/142) and myosteatosis (27/49), respectively. Cut points varied across studies. A significant majority of studies failed to report important CT technical parameters, such as use of intravenous contrast and slice thickness (94% and 63%, respectively). CONCLUSIONS There is considerable variation in the CT approaches used for the assessment of muscle mass and myosteatosis. There is a need to develop consensus for CT-based evaluation of sarcopenia and myosteatosis.
Collapse
Affiliation(s)
- Behrang Amini
- Department of Diagnostic Radiology, The University of Texas M.D. Anderson Cancer Center, Houston
| | - Sean P Boyle
- Department of Diagnostic Radiology, University of California, Davis School of Medicine, North Carolina
| | - Robert D Boutin
- Department of Diagnostic Radiology, University of California, Davis School of Medicine, North Carolina
| | - Leon Lenchik
- Department of Diagnostic Radiology, Wake Forest School of Medicine, Winston-Salem, North Carolina
| |
Collapse
|
38
|
Poltronieri TS, de Paula NS, Chaves GV. Assessing skeletal muscle radiodensity by computed tomography: An integrative review of the applied methodologies. Clin Physiol Funct Imaging 2020; 40:207-223. [PMID: 32196914 DOI: 10.1111/cpf.12629] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 03/04/2020] [Accepted: 03/12/2020] [Indexed: 12/15/2022]
Abstract
Low-radiodensity skeletal muscle has been related to the degree of muscle fat infiltration and seems to be associated with worse outcomes. The aim of this study was to summarize the methodologies used to appraise skeletal muscle radiodensity by computed tomography, to describe the terms used in the literature to define muscle radiodensity and to give recommendations for its measurement standardization. An integrative bibliographic review in four databases included studies published until August 2019 in Portuguese, English or Spanish and performed in humans, adults and/or the elderly, of both sex, which investigated skeletal muscle radiodensity through computed tomography (CT) of the region between the third and fifth lumbar vertebrae and evaluated at least two muscular groups. One hundred and seventeen studies were selected. We observed a trend towards selecting all abdominal region muscle. A significant methodological variation in terms of contrast use, selection of skeletal muscle areas, radiodensity ranges delimitation and their cut-off points, as well as the terminologies used, was also found. The methodological differences detected are probably due to the lack of more precise information about the correlation between skeletal muscle radiodensity by CT and its molecular composition, among others. Therefore, until the gaps are addressed in future studies, authors should avoid arbitrary approaches when reporting skeletal muscle radiodensity, especially when it comes to prognosis inference. Studies using both CT and direct methods of muscle composition evaluation are encouraged, to enable the definition and validation of the best approach to classify fat-infiltrated muscle tissue, which will favour the nomenclature uniformization.
Collapse
Affiliation(s)
- Taiara Scopel Poltronieri
- Department of Nutrition, National Cancer Institute José Alencar Gomes da Silva (INCA), Rio de Janeiro, Brazil
| | - Nathália Silva de Paula
- Department of Nutrition, National Cancer Institute José Alencar Gomes da Silva (INCA), Rio de Janeiro, Brazil
| | - Gabriela Villaça Chaves
- Department of Nutrition, National Cancer Institute José Alencar Gomes da Silva (INCA), Rio de Janeiro, Brazil
| |
Collapse
|
39
|
Assessment of paraspinal muscle characteristics, lumbar BMD, and their associations in routine multi-detector CT of patients with and without osteoporotic vertebral fractures. Eur J Radiol 2020; 125:108867. [PMID: 32065929 DOI: 10.1016/j.ejrad.2020.108867] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 01/17/2020] [Accepted: 01/29/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE To investigate paraspinal muscle characteristics and lumbar bone mineral density (BMD) and their associations in routine abdominal multi-detector computed tomography (MDCT) as well as the impact of osteoporotic vertebral fractures on such associations. METHOD 116 patients (69.7 ± 8.1 years, 72 males) who underwent routine abdominal MDCT (oncological staging and/or follow-up for tumor recurrence) were retrospectively included and assigned to a fracture and control group (age- and gender-matched), depending on the presence or absence of lumbar osteoporotic vertebral fractures. BMD was derived from lumbar vertebrae using a conversion equation, and the cross-sectional area (CSA), CSA ratio (CSA psoas muscles divided by CSA erector spinae muscles), and muscle attenuation were measured for the psoas and erector spinae muscles at the levels L2 and L4/5 without dedicated software. RESULTS Males showed significantly higher BMD, CSA, and CSA ratios at the levels L2 and L4/5, while females had decreased erector spinae muscle attenuation at L4/5 (p < 0.05). No significant differences between patients with versus without fractures were observed except for BMD (68.5 ± 37.2 mg/ml vs. 91.4 ± 26.8 mg/ml; p < 0.01). Age-adjusted partial correlation testing revealed significant correlations of BMD and the CSA ratio at level L4/5 (r = 0.20; p = 0.03), but not with muscle attenuation (p > 0.05). CONCLUSIONS Paraspinal muscle characteristics and lumbar BMD can be assessed seamlessly in routine abdominal MDCT without dedicated software. There are level-dependent interactions between paraspinal muscle characteristics as well as lumbar BMD. Vertebral fracture status was independent of paraspinal muscle characteristics.
Collapse
|
40
|
Tokuda T, Yamamoto M, Kagase A, Koyama Y, Otsuka T, Tada N, Naganuma T, Araki M, Yamanaka F, Shirai S, Mizutani K, Tabata M, Ueno H, Takagi K, Higashimori A, Watanabe Y, Hayashida K. Importance of combined assessment of skeletal muscle mass and density by computed tomography in predicting clinical outcomes after transcatheter aortic valve replacement. Int J Cardiovasc Imaging 2020; 36:929-938. [DOI: 10.1007/s10554-020-01776-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 01/20/2020] [Indexed: 12/18/2022]
|
41
|
Barnard R, Tan J, Roller B, Chiles C, Weaver AA, Boutin RD, Kritchevsky SB, Lenchik L. Machine Learning for Automatic Paraspinous Muscle Area and Attenuation Measures on Low-Dose Chest CT Scans. Acad Radiol 2019; 26:1686-1694. [PMID: 31326311 DOI: 10.1016/j.acra.2019.06.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 06/21/2019] [Accepted: 06/26/2019] [Indexed: 12/17/2022]
Abstract
RATIONALE AND OBJECTIVES To develop and evaluate an automated machine learning (ML) algorithm for segmenting the paraspinous muscles on chest computed tomography (CT) scans to evaluate for presence of sarcopenia. MATERIALS AND METHODS A convolutional neural network based on the U-Net architecture was trained to perform muscle segmentation on a dataset of 1875 single slice CT images and was tested on 209 CT images of participants in the National Lung Screening Trial. Low-dose, noncontrast CT examinations were obtained at 33 clinical sites, using scanners from four manufacturers. The study participants had a mean age of 71.6 years (range, 70-74 years). Ground truth was obtained by manually segmenting the left paraspinous muscle at the level of the T12 vertebra. Muscle cross-sectional area (CSA) and muscle attenuation (MA) were recorded. Comparison between the ML algorithm and ground truth measures of muscle CSA and MA were obtained using Dice similarity coefficients and Pearson correlations. RESULTS Compared to ground truth segmentation, the ML algorithm achieved median (standard deviation) Dice scores of 0.94 (0.04) in the test set. Mean (SD) muscle CSA was 14.3 (3.6) cm2 for ground truth and 13.7 (3.5) cm2 for ML segmentation. Mean (SD) MA was 41.6 (7.6) Hounsfield units (HU) for ground truth and 43.5 (7.9) HU for ML segmentation. There was high correlation between ML algorithm and ground truth for muscle CSA (r2 = 0.86; p < 0.0001) and MA (r2 = 0.95; p < 0.0001). CONCLUSION The ML algorithm for measurement of paraspinous muscles compared favorably to manual ground truth measurements in the NLST. The algorithm generalized well to a heterogeneous set of low-dose CT images and may be capable of automated quantification of muscle metrics to screen for sarcopenia on routine chest CT examinations.
Collapse
|
42
|
Zopfs D, Theurich S, Große Hokamp N, Knuever J, Gerecht L, Borggrefe J, Schlaak M, Pinto Dos Santos D. Single-slice CT measurements allow for accurate assessment of sarcopenia and body composition. Eur Radiol 2019; 30:1701-1708. [PMID: 31776743 DOI: 10.1007/s00330-019-06526-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/27/2019] [Accepted: 10/17/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVES To evaluate the correlation between simple planimetric measurements in axial computed tomography (CT) slices and measurements of patient body composition and anthropometric data performed with bioelectrical impedance analysis (BIA) and metric clinical assessments. METHODS In this prospective cross-sectional study, we analyzed data of a cohort of 62 consecutive, untreated adult patients with advanced malignant melanoma who underwent concurrent BIA assessments at their radiologic baseline staging by CT between July 2016 and October 2017. To assess muscle and adipose tissue mass, we analyzed the areas of the paraspinal muscles as well as the cross-sectional total patient area in a single CT slice at the height of the third lumbar vertebra. These measurements were subsequently correlated with anthropometric (body weight) and body composition parameters derived from BIA (muscle mass, fat mass, fat-free mass, and visceral fat mass). Linear regression models were built to allow for estimation of each parameter based on CT measurements. RESULTS Linear regression models allowed for accurate prediction of patient body weight (adjusted R2 = 0.886), absolute muscle mass (adjusted R2 = 0.866), fat-free mass (adjusted R2 = 0.855), and total as well as visceral fat mass (adjusted R2 = 0.887 and 0.839, respectively). CONCLUSIONS Our data suggest that patient body composition can accurately and quantitatively be determined by using simple measurements in a single axial CT slice. This could be useful in various medical and scientific settings, where the knowledge of the patient's anthropometric parameters is not immediately or easily available. KEY POINTS • Easy to perform measurements on a single CT slice highly correlate with clinically valuable parameters of body composition. • Body composition data were acquired using bioelectrical impedance analysis to correlate CT measurements with a non-imaging-based method, which is frequently lacking in previous studies. • The obtained equations facilitate a quick, opportunistic assessment of relevant parameters of body composition.
Collapse
Affiliation(s)
- David Zopfs
- Faculty of Medicine and University Hospital Cologne, Department for Diagnostic and Interventional Radiology, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany.
| | - Sebastian Theurich
- Cancer- and Immunometabolism Research Group, Gene Center LMU, Ludwig-Maximilians-University, Munich, Germany.,Department of Medicine III, University Hospital LMU, Ludwig-Maximilian University, Munich, Germany
| | - Nils Große Hokamp
- Faculty of Medicine and University Hospital Cologne, Department for Diagnostic and Interventional Radiology, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| | - Jana Knuever
- Faculty of Medicine and University Hospital Cologne, Department of Dermatology and Venereology, University of Cologne, Cologne, Germany
| | - Lukas Gerecht
- Faculty of Medicine and University Hospital Cologne, Department of Dermatology and Venereology, University of Cologne, Cologne, Germany
| | - Jan Borggrefe
- Faculty of Medicine and University Hospital Cologne, Department for Diagnostic and Interventional Radiology, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| | - Max Schlaak
- Department of Dermatology and Allergy, University Hospital, LMU Munich, Munich, Germany
| | - Daniel Pinto Dos Santos
- Faculty of Medicine and University Hospital Cologne, Department for Diagnostic and Interventional Radiology, University of Cologne, Kerpener Strasse 62, 50937, Cologne, Germany
| |
Collapse
|
43
|
Richardson ML. MR Protocol Optimization With Deep Learning: A Proof of Concept. Curr Probl Diagn Radiol 2019; 50:168-174. [PMID: 31732262 DOI: 10.1067/j.cpradiol.2019.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 10/16/2019] [Indexed: 11/22/2022]
Abstract
PURPOSE This study was performed to demonstrate that a properly trained convolutional neural net (CNN) can provide an acceptable surrogate for human readers when performing a protocol optimization study. Tears of the anterior cruciate ligament (ACL) were used as a proof of concept for this study. METHODS Following institutional review board approval, a curated set of 2007 paired knee MR images was extracted from the author's picture archival and communications system for 1523 normal knees and 484 knees with torn ACLs. A pair (1 fat-saturated (FS) and 1 non-fat-saturated (NFS)) of midline sagittal images was extracted from each knee. CNNs were trained for both the FS and NFS image sets and used to make predictions on a previously unseen test set of images. RESULTS Receiver operating characteristic area under the curve for the NFS and FS CNNs were, respectively, 0.9983 and 0.9988. Specificity was identical (0.993) for both NFS and FS images. FS sensitivity (0.98) and NFS sensitivity (0.88) were statistically significantly different (P = 0.0253). CONCLUSIONS Both FS and NFS performed very well for the diagnosis of ACL tears, although FS sensitivity was superior to NFS sensitivity. The CNNs provided an acceptable surrogate for a human reader in this study. Pulse sequence optimization studies such as this can be opportunistically performed on image sets collected for many other machine learning purposes.
Collapse
|
44
|
Barbalho ER, Gonzalez MC, Bielemann RM, da Rocha IMG, de Sousa IM, Bezerra RA, de Medeiros GOC, Fayh APT. Is skeletal muscle radiodensity able to indicate physical function impairment in older adults with gastrointestinal cancer? Exp Gerontol 2019; 125:110688. [DOI: 10.1016/j.exger.2019.110688] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/04/2019] [Accepted: 08/08/2019] [Indexed: 12/26/2022]
|
45
|
McNamara KP, Greene KA, Tooze JA, Dang J, Khattab K, Lenchik L, Weaver AA. Neck Muscle Changes Following Long-Duration Spaceflight. Front Physiol 2019; 10:1115. [PMID: 31572205 PMCID: PMC6753191 DOI: 10.3389/fphys.2019.01115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/12/2019] [Indexed: 12/25/2022] Open
Abstract
The effects of long-duration spaceflight on crewmember neck musculature have not been adequately studied. The purpose of this study was to evaluate the changes in the neck musculature on pre-flight and post-flight magnetic resonance imaging (MRI) examinations of six crewmembers on 4- to 6-month missions equipped with the advanced resistive exercise device (aRED). The MRI images were resliced to remove variations in spinal curvature, the cross-sectional area (CSA), and muscle fat infiltration (MFI) of neck musculature at the C1-C2, C4-C5, C7-T1, and T1-T2 intervertebral disc levels were measured bilaterally. Percent changes in the neck muscle CSA and fatty infiltration following spaceflight were calculated, and mixed models were used to assess significance of these changes. Crewmembers on missions equipped with the aRED experienced an average 25.1% increase in CSA for the trapezius muscle at C6-C7, an average 11.5% increase in CSA for the semispinalis capitis muscle at C4-C5, an average 9.0% increase in CSA for the sternocleidomastoid muscle at C4-C5, and an average 23.1% increase in CSA for the rhomboid minor at T1-T2. There were no significant changes in the CSA of the levator scapulae, splenius capitis, rectus capitis posterior major, scalenus anterior, scalenus posterior, scalenus medius, longissimus capitis, or obliquus capitis inferior muscles at the locations measured. None of the muscles analyzed experienced statistically significant changes in fatty infiltration with spaceflight. Our study indicates that long-duration spaceflight conditions are associated with preservation of CSA in most neck muscles and significant increases in the CSAs of the trapezius, semispinalis capitis, sternocleidomastoid, and rhomboid minor muscles. This may indicate that cervical muscles are not subjected to the same degradative effects microgravity imparts on the majority of muscles.
Collapse
Affiliation(s)
- Kyle P McNamara
- Department of Biomedical Engineering, Center of Injury Biomechanics, Wake Forest School of Medicine, Winston-Salem, NC, United States.,School of Biomedical Engineering and Sciences (SBES), Virginia Tech - Wake Forest University, Winston-Salem, NC, United States
| | - Katelyn A Greene
- Department of Biomedical Engineering, Center of Injury Biomechanics, Wake Forest School of Medicine, Winston-Salem, NC, United States.,School of Biomedical Engineering and Sciences (SBES), Virginia Tech - Wake Forest University, Winston-Salem, NC, United States
| | - Janet A Tooze
- Department of Biostatistical Sciences, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Jade Dang
- Department of Biomedical Engineering, Center of Injury Biomechanics, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Karim Khattab
- Department of Biomedical Engineering, Center of Injury Biomechanics, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Leon Lenchik
- Department of Radiology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Ashley A Weaver
- Department of Biomedical Engineering, Center of Injury Biomechanics, Wake Forest School of Medicine, Winston-Salem, NC, United States.,School of Biomedical Engineering and Sciences (SBES), Virginia Tech - Wake Forest University, Winston-Salem, NC, United States
| |
Collapse
|
46
|
Faron A, Luetkens JA, Schmeel FC, Kuetting DL, Thomas D, Sprinkart AM. Quantification of fat and skeletal muscle tissue at abdominal computed tomography: associations between single-slice measurements and total compartment volumes. Abdom Radiol (NY) 2019; 44:1907-1916. [PMID: 30694368 DOI: 10.1007/s00261-019-01912-9] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE Body composition is of great prognostic value in several severe diseases, including different types of cancer as well as cardiometabolic disorders. We aimed to investigate the correlations of skeletal muscle mass and abdominal adipose tissue compartments between volumetric and single-slice measurements to study the usefulness of several anatomical landmarks for estimation of total compartment volumes using abdominal CT-scans. METHODS In this retrospective study volumetric quantifications of paraspinal skeletal muscles (SM) and adipose tissue compartments (visceral adipose tissue, VAT; subcutaneous adipose tissue, SAT) were performed in 50 consecutive patients (26 male; mean age, 63 ± 15 years) who underwent abdominal multislice-CT for diagnostic purposes using an in-house software. Associations between total volumes of SM, VAT, and SAT with single-slice measurements at eight predefined anatomical landmarks (median intervertebral disk spaces T12/L1 to L5/S1; level of the umbilicus (U); level of the radix of the superior mesenteric artery (SMA)) were studied using correlation coefficients. RESULTS Statistical analysis revealed a strong association between single-slice measurements of adipose tissue compartments with total VAT and SAT volume (VAT: all r > 0.89, P < 0.001; SAT: all r > 0.95, P < 0.001). The strongest associations with total SM volume were found for single-slice measurements obtained at L3/4 (r = 0.94, P < 0.001) and were further improved by normalization to height (r = 0.98, P < 0.001). CONCLUSIONS Single-slice measurements of SM, VAT, and SAT at several anatomical landmarks are strongly associated with total compartment volumes and therefore allow for easy and simultaneous assessment of skeletal muscle mass and adipose tissue compartment volumes.
Collapse
|
47
|
Brandt E, Tengberg LT, Bay-Nielsen M. Sarcopenia predicts 90-day mortality in elderly patients undergoing emergency abdominal surgery. Abdom Radiol (NY) 2019; 44:1155-1160. [PMID: 30600384 DOI: 10.1007/s00261-018-1870-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Image-based measurement of sarcopenia is an established predictor of a decreased outcome for a large variety of surgical procedures. Sarcopenia in elderly patients undergoing emergency abdominal surgery has not been well studied. This study aims to investigate the association between the total psoas area (TPA) and postoperative mortality after 90 days in a group of elderly emergency laparotomy patients. METHODS We retrospectively reviewed the emergency CT-scans of 150 elderly patients from a consecutive cohort undergoing emergency abdominal surgery at our surgical center. TPA was measured manually at the level of L3 and indexed to patient height. Sarcopenia was defined as having a TPA index below the first quartile for gender in the cohort. Other collected variables were age, vital status/date of death, ASA-score, surgical procedure, and WHO performance score. RESULTS Overall 90-day mortality was 42.7%. Sarcopenic patients had a higher 90-day mortality (60.5%) than non-sarcopenic patients (36.6%), corresponding to an odds ratio of 2.66 (95% confidence interval 1.2-5.7, p = 0.01). Sarcopenic patients had an increased mortality compared with non-sarcopenic patients (p = 0.0009, Log-rank test), with a clear separation of the two groups within 30 days postoperatively. In a multivariate logistic regression model, with age, ASA-score, and WHO performance score as covariates, sarcopenia was independently associated with 90-day mortality. CONCLUSION Manual measurement of TPA on an abdominal CT-scan is a relevant risk factor for postoperative mortality in elderly patients undergoing high-risk emergency abdominal surgery. Incorporation of sarcopenia in postoperative risk-prediction models in emergency abdominal surgery should be considered.
Collapse
|
48
|
Lenchik L, Weaver AA, Ward RJ, Boone JM, Boutin RD. Opportunistic Screening for Osteoporosis Using Computed Tomography: State of the Art and Argument for Paradigm Shift. Curr Rheumatol Rep 2018; 20:74. [PMID: 30317448 DOI: 10.1007/s11926-018-0784-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PURPOSE OF REVIEW Osteoporosis is disproportionately common in rheumatology patients. For the past three decades, the diagnosis of osteoporosis has benefited from well-established practice guidelines that emphasized the use of dual x-ray absorptiometry (DXA). Despite these guidelines and the wide availability of DXA, approximately two thirds of eligible patients do not undergo testing. One strategy to improve osteoporosis testing is to employ computed tomography (CT) examinations obtained as part of routine patient care to "opportunistically" screen for osteoporosis, without additional cost or radiation exposure to patients. This review examines the role of opportunistic CT in the evaluation of osteoporosis. RECENT FINDINGS Recent evidence suggests that opportunistic measurement of bone attenuation (radiodensity) using CT has sensitivity comparable to DXA. More importantly, such an approach has been shown to predict osteoporotic fractures. The paradigm shift of using CTs obtained for other reasons to opportunistically screen for osteoporosis promises to substantially improve patient care.
Collapse
Affiliation(s)
- Leon Lenchik
- Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA.
| | - Ashley A Weaver
- Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
| | - Robert J Ward
- Tufts University School of Medicine, 800 Washington Street, Boston, MA, 02111, USA
| | - John M Boone
- University of California Davis Medical Center, 4860 Y Street, Suite 3100, Sacramento, CA, 95817, USA
| | - Robert D Boutin
- University of California Davis School of Medicine, 4860 Y Street, Suite 3100, Sacramento, CA, 95817, USA
| |
Collapse
|