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Maiorino E, De Marzio M, Xu Z, Yun JH, Chase RP, Hersh CP, Weiss ST, Silverman EK, Castaldi PJ, Glass K. Joint clinical and molecular subtyping of COPD with variational autoencoders. medRxiv 2024:2023.08.19.23294298. [PMID: 38260473 PMCID: PMC10802661 DOI: 10.1101/2023.08.19.23294298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Chronic Obstructive Pulmonary Disease (COPD) is a complex, heterogeneous disease. Traditional subtyping methods generally focus on either the clinical manifestations or the molecular endotypes of the disease, resulting in classifications that do not fully capture the disease's complexity. Here, we bridge this gap by introducing a subtyping pipeline that integrates clinical and gene expression data with variational autoencoders. We apply this methodology to the COPDGene study, a large study of current and former smoking individuals with and without COPD. Our approach generates a set of vector embeddings, called Personalized Integrated Profiles (PIPs), that recapitulate the joint clinical and molecular state of the subjects in the study. Prediction experiments show that the PIPs have a predictive accuracy comparable to or better than other embedding approaches. Using trajectory learning approaches, we analyze the main trajectories of variation in the PIP space and identify five well-separated subtypes with distinct clinical phenotypes, expression signatures, and disease outcomes. Notably, these subtypes are more robust to data resampling compared to those identified using traditional clustering approaches. Overall, our findings provide new avenues to establish fine-grained associations between the clinical characteristics, molecular processes, and disease outcomes of COPD.
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Affiliation(s)
- Enrico Maiorino
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Margherita De Marzio
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Zhonghui Xu
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Jeong H. Yun
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Robert P. Chase
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Craig P. Hersh
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Scott T. Weiss
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
| | - Edwin K. Silverman
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School
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Antão J, de Mast J, Marques A, Franssen FME, Spruit MA, Deng Q. Demystification of artificial intelligence for respiratory clinicians managing patients with obstructive lung diseases. Expert Rev Respir Med 2023; 17:1207-1219. [PMID: 38270524 DOI: 10.1080/17476348.2024.2302940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 01/04/2024] [Indexed: 01/26/2024]
Abstract
INTRODUCTION Asthma and chronic obstructive pulmonary disease (COPD) are leading causes of morbidity and mortality worldwide. Despite all available diagnostics and treatments, these conditions pose a significant individual, economic and social burden. Artificial intelligence (AI) promises to support clinical decision-making processes by optimizing diagnosis and treatment strategies of these heterogeneous and complex chronic respiratory diseases. Its capabilities extend to predicting exacerbation risk, disease progression and mortality, providing healthcare professionals with valuable insights for more effective care. Nevertheless, the knowledge gap between respiratory clinicians and data scientists remains a major constraint for wide application of AI and may hinder future progress. This narrative review aims to bridge this gap and encourage AI deployment by explaining its methodology and added value in asthma and COPD diagnosis and treatment. AREAS COVERED This review offers an overview of the fundamental concepts of AI and machine learning, outlines the key steps in building a model, provides examples of their applicability in asthma and COPD care, and discusses barriers to their implementation. EXPERT OPINION Machine learning can advance our understanding of asthma and COPD, enabling personalized therapy and better outcomes. Further research and validation are needed to ensure the development of clinically meaningful and generalizable models.
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Affiliation(s)
- Joana Antão
- Lab3R - Respiratory Research and Rehabilitation Laboratory, School of Health Sciences, University of Aveiro (ESSUA), Aveiro, Portugal
- iBiMED - Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
- Department of Research and Development, Ciro, Horn, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Jeroen de Mast
- Economics and Business, University of Amsterdam, Amsterdam, The Netherlands
| | - Alda Marques
- Lab3R - Respiratory Research and Rehabilitation Laboratory, School of Health Sciences, University of Aveiro (ESSUA), Aveiro, Portugal
- iBiMED - Institute of Biomedicine, Department of Medical Sciences, University of Aveiro, Aveiro, Portugal
| | - Frits M E Franssen
- Department of Research and Development, Ciro, Horn, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Martijn A Spruit
- Department of Research and Development, Ciro, Horn, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
| | - Qichen Deng
- Department of Research and Development, Ciro, Horn, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, NUTRIM School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, the Netherlands
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Koblizek V, Milenkovic B, Svoboda M, Kocianova J, Holub S, Zindr V, Ilic M, Jankovic J, Cupurdija V, Jarkovsky J, Popov B, Valipour A. RETRO-POPE: A Retrospective, Multicenter, Real-World Study of All-Cause Mortality in COPD. Int J Chron Obstruct Pulmon Dis 2023; 18:2661-2672. [PMID: 38022829 PMCID: PMC10661906 DOI: 10.2147/copd.s426919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023] Open
Abstract
Purpose The Phenotypes of COPD in Central and Eastern Europe (POPE) study assessed the prevalence and clinical characteristics of four clinical COPD phenotypes, but not mortality. This retrospective analysis of the POPE study (RETRO-POPE) investigated the relationship between all-cause mortality and patient characteristics using two grouping methods: clinical phenotyping (as in POPE) and Burgel clustering, to better identify high-risk patients. Patients and Methods The two largest POPE study patient cohorts (Czech Republic and Serbia) were categorized into one of four clinical phenotypes (acute exacerbators [with/without chronic bronchitis], non-exacerbators, asthma-COPD overlap), and one of five Burgel clusters based on comorbidities, lung function, age, body mass index (BMI) and dyspnea (very severe comorbid, very severe respiratory, moderate-to-severe respiratory, moderate-to-severe comorbid/obese, and mild respiratory). Patients were followed-up for approximately 7 years for survival status. Results Overall, 801 of 1,003 screened patients had sufficient data for analysis. Of these, 440 patients (54.9%) were alive and 361 (45.1%) had died at the end of follow-up. Analysis of survival by clinical phenotype showed no significant differences between the phenotypes (P=0.211). However, Burgel clustering demonstrated significant differences in survival between clusters (P<0.001), with patients in the "very severe comorbid" and "very severe respiratory" clusters most likely to die. Overall survival was not significantly different between Serbia and the Czech Republic after adjustment for age, BMI, comorbidities and forced expiratory volume in 1 second (hazard ratio [HR] 0.80, 95% confidence interval [CI] 0.65-0.99; P=0.036 [unadjusted]; HR 0.88, 95% CI 0.7-1.1; P=0.257 [adjusted]). The most common causes of death were respiratory-related (36.8%), followed by cardiovascular (25.2%) then neoplasm (15.2%). Conclusion Patient clusters based on comorbidities, lung function, age, BMI and dyspnea were more likely to show differences in COPD mortality risk than phenotypes defined by exacerbation history and presence/absence of chronic bronchitis and/or asthmatic features.
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Affiliation(s)
- Vladimir Koblizek
- Department of Pneumology, University Hospital, Hradec Kralove, Czech Republic
- Faculty of Medicine Hradec Kralove, Charles University, Hradec Kralove, Czech Republic
| | - Branislava Milenkovic
- Clinic for Pulmonary Diseases, Clinical Center of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Michal Svoboda
- Institute of Biostatistics and Analyses Ltd., Brno, Czech Republic
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jana Kocianova
- Outpatient Department of Pneumology Alveolus, APRO MED, Ostrava, Czech Republic
| | - Stanislav Holub
- Outpatient Chest Clinic, Plicni Stredisko Teplice Ltd., Teplice, Czech Republic
| | - Vladimir Zindr
- Outpatient Chest Clinic, PNEUMO KV Ltd., Karlovy Vary, Czech Republic
| | - Miroslav Ilic
- Faculty of Medicine, University of Novi Sad, Novi Sad, Serbia
- Clinic for Tuberculosis and Interstitial Lung Diseases, PolyClinic Department, Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica, Serbia
| | - Jelena Jankovic
- Clinic for Pulmonary Diseases, Clinical Center of Serbia, Belgrade, Serbia
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Vojislav Cupurdija
- Department of Internal Medicine, Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia
- Clinic for Pulmonology, University Clinical Center Kragujevac, Kragujevac, Serbia
| | - Jiri Jarkovsky
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Boris Popov
- Medicine Department, Boehringer Ingelheim Serbia d.o.o. Beograd, Belgrade, Serbia
| | - Arschang Valipour
- Karl Landsteiner Institute for Lung Research and Pulmonary Oncology, Klinik Floridsdorf, Vienna Health Care Group, Vienna, Austria
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Castaldi PJ, Xu Z, Young KA, Hokanson JE, Lynch DA, Humphries SM, Ross JC, Cho MH, Hersh CP, Crapo JD, Strand M, Silverman EK. Heterogeneity and Progression of Chronic Obstructive Pulmonary Disease: Emphysema-Predominant and Non-Emphysema-Predominant Disease. Am J Epidemiol 2023; 192:1647-1658. [PMID: 37160347 PMCID: PMC11063557 DOI: 10.1093/aje/kwad114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 12/20/2022] [Accepted: 05/04/2023] [Indexed: 05/11/2023] Open
Abstract
While variation in emphysema severity between patients with chronic obstructive pulmonary disease (COPD) is well-recognized, clinically applicable definitions of the emphysema-predominant disease (EPD) and non-emphysema-predominant disease (NEPD) subtypes have not been established. To study the clinical relevance of the EPD and NEPD subtypes, we tested the association of these subtypes with prospective decline in forced expiratory volume in 1 second (FEV1) and mortality among 3,427 subjects with Global Initiative for Chronic Obstructive Lung Disease (GOLD) spirometric grade 2-4 COPD at baseline in the Genetic Epidemiology of COPD (COPDGene) Study, an ongoing national multicenter study that started in 2007. NEPD was defined as airflow obstruction with less than 5% computed tomography (CT) quantitative densitometric emphysema at -950 Hounsfield units, and EPD was defined as airflow obstruction with 10% or greater CT emphysema. Mixed-effects models for FEV1 demonstrated larger average annual FEV1 loss in EPD subjects than in NEPD subjects (-10.2 mL/year; P < 0.001), and subtype-specific associations with FEV1 decline were identified. Cox proportional hazards models showed higher risk of mortality among EPD patients versus NEPD patients (hazard ratio = 1.46, 95% confidence interval: 1.34, 1.60; P < 0.001). To determine whether the NEPD/EPD dichotomy is captured by previously described COPDGene subtypes, we used logistic regression and receiver operating characteristic (ROC) curve analysis to predict NEPD/EPD membership using these previous subtype definitions. The analysis generally showed excellent discrimination, with areas under the ROC curve greater than 0.9. The NEPD and EPD COPD subtypes capture important aspects of COPD heterogeneity and are associated with different rates of disease progression and mortality.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Edwin K Silverman
- Correspondence to Dr. Edwin K. Silverman, Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital, 181 Longwood Avenue, Boston, MA 02115 (e-mail: )
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Regard L, Roche N, Burgel PR. The Ongoing Quest for Predictive Biomarkers in Chronic Obstructive Pulmonary Disease. Am J Respir Crit Care Med 2023; 208:511-513. [PMID: 37478331 PMCID: PMC10492241 DOI: 10.1164/rccm.202306-0957ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/19/2023] [Indexed: 07/23/2023] Open
Affiliation(s)
- Lucile Regard
- Université Paris Cité Inserm U1016, Institut Cochin Paris, France and Department of Respiratory Medicine Cochin Hospital, Assistance Publique - Hôpitaux de Paris Paris, France
| | - Nicolas Roche
- Université Paris Cité Inserm U1016, Institut Cochin Paris, France and Department of Respiratory Medicine Cochin Hospital, Assistance Publique - Hôpitaux de Paris Paris, France
| | - Pierre-Régis Burgel
- Université Paris Cité Inserm U1016, Institut Cochin Paris, France and Department of Respiratory Medicine Cochin Hospital, Assistance Publique - Hôpitaux de Paris Paris, France
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Yin C, Udrescu M, Gupta G, Cheng M, Lihu A, Udrescu L, Bogdan P, Mannino DM, Mihaicuta S. Fractional Dynamics Foster Deep Learning of COPD Stage Prediction. Adv Sci (Weinh) 2023; 10:e2203485. [PMID: 36808826 PMCID: PMC10131808 DOI: 10.1002/advs.202203485] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 01/03/2023] [Indexed: 05/28/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is one of the leading causes of death worldwide. Current COPD diagnosis (i.e., spirometry) could be unreliable because the test depends on an adequate effort from the tester and testee. Moreover, the early diagnosis of COPD is challenging. The authors address COPD detection by constructing two novel physiological signals datasets (4432 records from 54 patients in the WestRo COPD dataset and 13824 medical records from 534 patients in the WestRo Porti COPD dataset). The authors demonstrate their complex coupled fractal dynamical characteristics and perform a fractional-order dynamics deep learning analysis to diagnose COPD. The authors found that the fractional-order dynamical modeling can extract distinguishing signatures from the physiological signals across patients with all COPD stages-from stage 0 (healthy) to stage 4 (very severe). They use the fractional signatures to develop and train a deep neural network that predicts COPD stages based on the input features (such as thorax breathing effort, respiratory rate, or oxygen saturation). The authors show that the fractional dynamic deep learning model (FDDLM) achieves a COPD prediction accuracy of 98.66% and can serve as a robust alternative to spirometry. The FDDLM also has high accuracy when validated on a dataset with different physiological signals.
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Affiliation(s)
- Chenzhong Yin
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Mihai Udrescu
- Department of Computer and Information TechnologyPolitehnica University of Timisoara2 Vasile Parvan Blvd.Timişoara300223Romania
| | - Gaurav Gupta
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Mingxi Cheng
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
| | - Andrei Lihu
- Department of Computer and Information TechnologyPolitehnica University of Timisoara2 Vasile Parvan Blvd.Timişoara300223Romania
| | - Lucretia Udrescu
- Department I – Drug Analysis“Victor Babeş”University of Medicine and Pharmacy Timişoara2 Eftimie Murgu Sq.Timişoara300041Romania
| | - Paul Bogdan
- Ming Hsieh Department of Electrical and Computer EngineeringUniversity of Southern CaliforniaLos AngelesCAUSA
| | | | - Stefan Mihaicuta
- Department of PulmonologyCenter for Research and Innovation in Precision Medicine of Respiratory Diseases, “Victor Babes” University of Medicine and Pharmacy2 Eftimie Murgu Sq.Timişoara300041Romania
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Gagatek S, Wijnant SRA, Ställberg B, Lisspers K, Brusselle G, Zhou X, Hasselgren M, Montgomeryi S, Sundhj J, Janson C, Emilsson Ö, Lahousse L, Malinovschi A. Validation of Clinical COPD Phenotypes for Prognosis of Long-Term Mortality in Swedish and Dutch Cohorts. COPD 2022; 19:330-338. [PMID: 36074400 DOI: 10.1080/15412555.2022.2039608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease with variable mortality risk. The aim of our investigation was to validate a simple clinical algorithm for long-term mortality previously proposed by Burgel et al. in 2017. Subjects with COPD from two cohorts, the Swedish PRAXIS study (n = 784, mean age (standard deviation (SD)) 64.0 years (7.5), 42% males) and the Rotterdam Study (n = 735, mean age (SD) 72 years (9.2), 57% males), were included. Five clinical clusters were derived from baseline data on age, body mass index, dyspnoea grade, pulmonary function and comorbidity (cardiovascular disease/diabetes). Cox models were used to study associations with 9-year mortality. The distribution of clinical clusters (1-5) was 29%/45%/8%/6%/12% in the PRAXIS study and 23%/26%/36%/0%/15% in the Rotterdam Study. The cumulative proportion of deaths at the 9-year follow-up was highest in clusters 1 (65%) and 4 (72%), and lowest in cluster 5 (10%) in the PRAXIS study. In the Rotterdam Study, cluster 1 (44%) had the highest cumulative mortality and cluster 5 (5%) the lowest. Compared with cluster 5, the meta-analysed age- and sex-adjusted hazard ratio (95% confidence interval) for cluster 1 was 6.37 (3.94-10.32) and those for clusters 2 and 3 were 2.61 (1.58-4.32) and 3.06 (1.82-5.13), respectively. Burgel's clinical clusters can be used to predict long-term mortality risk. Clusters 1 and 4 are associated with the poorest prognosis, cluster 5 with the best prognosis and clusters 2 and 3 with intermediate prognosis in two independent cohorts from Sweden and the Netherlands.
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Affiliation(s)
- S Gagatek
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - S R A Wijnant
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.,Department of Epidemiology, Erasmus Medical Centre, Rotterdam, Netherlands.,Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - B Ställberg
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - K Lisspers
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - G Brusselle
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium.,Department of Epidemiology, Erasmus Medical Centre, Rotterdam, Netherlands.,Department of Respiratory Medicine, Erasmus Medical Centre, Rotterdam, Netherlands
| | - X Zhou
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden.,Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
| | - M Hasselgren
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - S Montgomeryi
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden
| | - J Sundhj
- Department of Respiratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - C Janson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Ö Emilsson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - L Lahousse
- Department of Epidemiology, Erasmus Medical Centre, Rotterdam, Netherlands.,Department of Bioanalysis, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - A Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
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Yuan NF, Hasenstab K, Retson T, Conrad DJ, Lynch DA, Hsiao A. Unsupervised Learning Identifies Computed Tomographic Measurements as Primary Drivers of Progression, Exacerbation, and Mortality in Chronic Obstructive Pulmonary Disease. Ann Am Thorac Soc 2022; 19:1993-2002. [PMID: 35830591 DOI: 10.1513/AnnalsATS.202110-1127OC] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Rationale: Chronic obstructive pulmonary disease (COPD) is a heterogeneous syndrome with phenotypic manifestations that tend to be distributed along a continuum. Unsupervised machine learning based on broad selection of imaging and clinical phenotypes may be used to identify primary variables that define disease axes and stratify patients with COPD. Objectives: To identify primary variables driving COPD heterogeneity using principal component analysis and to define disease axes and assess the prognostic value of these axes across three outcomes: progression, exacerbation, and mortality. Methods: We included 7,331 patients between 39 and 85 years old, of whom 40.3% were Black and 45.8% were female smokers with a mean of 44.6 pack-years, from the COPDGene (Genetic Epidemiology of COPD) phase I cohort (2008-2011) in our analysis. Out of a total of 916 phenotypes, 147 continuous clinical, spirometric, and computed tomography (CT) features were selected. For each principal component (PC), we computed a PC score based on feature weights. We used PC score distributions to define disease axes along which we divided the patients into quartiles. To assess the prognostic value of these axes, we applied logistic regression analyses to estimate 5-year (n = 4,159) and 10-year (n = 1,487) odds of progression. Cox regression and Kaplan-Meier analyses were performed to estimate 5-year and 10-year risk of exacerbation (n = 6,532) and all-cause mortality (n = 7,331). Results: The first PC, accounting for 43.7% of variance, was defined by CT measures of air trapping and emphysema. The second PC, accounting for 13.7% of variance, was defined by spirometric and CT measures of vital capacity and lung volume. The third PC, accounting for 7.9% of the variance, was defined by CT measures of lung mass, airway thickening, and body habitus. Stratification of patients across each disease axis revealed up to 3.2-fold (95% confidence interval [CI] 2.4, 4.3) greater odds of 5-year progression, 5.4-fold (95% CI 4.6, 6.3) greater risk of 5-year exacerbation, and 5.0-fold (95% CI 4.2, 6.0) greater risk of 10-year mortality between the highest and lowest quartiles. Conclusions: Unsupervised learning analysis of the COPDGene cohort reveals that CT measurements may bolster patient stratification along the continuum of COPD phenotypes. Each of the disease axes also individually demonstrate prognostic potential, predictive of future forced expiratory volume in 1 second decline, exacerbation, and mortality.
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Kaminsky DA, Irvin CG. The Physiology of Asthma-Chronic Obstructive Pulmonary Disease Overlap. Immunol Allergy Clin North Am 2022; 42:575-589. [DOI: 10.1016/j.iac.2022.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Brennan M, McDonnell MJ, Harrison MJ, Duignan N, O’Regan A, Murphy DM, Ward C, Rutherford RM. Antimicrobial therapies for prevention of recurrent acute exacerbations of COPD (AECOPD): beyond the guidelines. Respir Res 2022; 23:58. [PMID: 35287677 PMCID: PMC8919139 DOI: 10.1186/s12931-022-01947-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 02/04/2022] [Indexed: 12/19/2022] Open
Abstract
Background Unfortunately, many COPD patients continue to exacerbate despite good adherence to GOLD Class D recommended therapy. Acute exacerbations lead to an increase in symptoms, decline in lung function and increased mortality rate. The purpose of this review is to do a literature search for any prophylactic anti-microbial treatment trials in GOLD class D patients who ‘failed’ recommended therapy and discuss the role of COPD phenotypes, lung and gut microbiota and co-morbidities in developing a tailored approach to anti-microbial therapies for high frequency exacerbators. Main text There is a paucity of large, well-conducted studies in the published literature to date. Factors such as single-centre, study design, lack of well-defined controls, insufficient patient numbers enrolled and short follow-up periods were significant limiting factors in numerous studies. One placebo-controlled study involving more than 1000 patients, who had 2 or more moderate exacerbations in the previous year, demonstrated a non-significant reduction in exacerbations of 19% with 5 day course of moxifloxacillin repeated at 8 week intervals. In Pseudomonas aeruginosa (Pa) colonised COPD patients, inhaled antimicrobial therapy using tobramycin, colistin and gentamicin resulted in significant reductions in exacerbation frequency. Viruses were found to frequently cause acute exacerbations in COPD (AECOPD), either as the primary infecting agent or as a co-factor. However, other, than the influenza vaccination, there were no trials of anti-viral therapies that resulted in a positive effect on reducing AECOPD. Identifying clinical phenotypes and co-existing conditions that impact on exacerbation frequency and severity is essential to provide individualised treatment with targeted therapies. The role of the lung and gut microbiome is increasingly recognised and identification of pathogenic bacteria will likely play an important role in personalised antimicrobial therapies. Conclusion Antimicrobial therapeutic options in patients who continue to exacerbate despite adherence to guidelines-directed therapy are limited. Phenotyping patients, identification of co-existing conditions and assessment of the microbiome is key to individualising antimicrobial therapy. Given the impact of viruses on AECOPD, anti-viral therapeutic agents and targeted anti-viral vaccinations should be the focus of future research studies.
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Marques A, Souto-miranda S, Machado A, Oliveira A, Jácome C, Cruz J, Enes V, Afreixo V, Martins V, Andrade L, Valente C, Ferreira D, Simão P, Brooks D, Tavares AH. COPD profiles and treatable traits using minimal resources: identification, decision tree and stability over time. Respir Res 2022; 23. [PMID: 35164762 PMCID: PMC8842856 DOI: 10.1186/s12931-022-01954-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 02/08/2022] [Indexed: 12/11/2022] Open
Abstract
Abstract
Background and objective
Profiles of people with chronic obstructive pulmonary disease (COPD) often do not describe treatable traits, lack validation and/or their stability over time is unknown. We aimed to identify COPD profiles and their treatable traits based on simple and meaningful measures; to develop and validate a decision tree and to explore profile stability over time.
Methods
An observational, prospective study was conducted. Clinical characteristics, lung function, symptoms, impact of the disease (COPD Assessment Test—CAT), health-related quality of life, physical activity, lower-limb muscle strength and functional status were collected cross-sectionally and a subsample was followed-up monthly over six months. A principal component analysis and a clustering procedure with k-medoids were applied to identify profiles. A decision tree was developed and validated cross-sectionally. Stability was explored over time with the ratio between the number of timepoints that a participant was classified in the same profile and the total number of timepoints (i.e., 6).
Results
352 people with COPD (67.4 ± 9.9 years; 78.1% male; FEV1 = 56.2 ± 20.6% predicted) participated and 90 (67.6 ± 8.9 years; 85.6% male; FEV1 = 52.1 ± 19.9% predicted) were followed-up. Four profiles were identified with distinct treatable traits. The decision tree included CAT (< 18 or ≥ 18 points); age (< 65 or ≥ 65 years) and FEV1 (< 48 or ≥ 48% predicted) and had an agreement of 71.7% (Cohen’s Kappa = 0.62, p < 0.001) with the actual profiles. 48.9% of participants remained in the same profile whilst 51.1% moved between two (47.8%) or three (3.3%) profiles over time. Overall stability was 86.8 ± 15%.
Conclusion
Four profiles and treatable traits were identified with simple and meaningful measures possibly available in low-resource settings. A decision tree with three commonly used variables in the routine assessment of people with COPD is now available for quick allocation to the identified profiles in clinical practice. Profiles and treatable traits may change over time in people with COPD hence, regular assessments to deliver goal-targeted personalised treatments are needed.
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van Zelst CM, Goossens LMA, Witte JA, Braunstahl GJ, Hendriks RW, Rutten-van Molken MPMH, Veen JCCMI. Stratification of COPD patients towards personalized medicine: reproduction and formation of clusters. Respir Res 2022; 23:336. [PMID: 36494786 DOI: 10.1186/s12931-022-02256-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 11/19/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The global initiative for chronic obstructive lung disease (GOLD) 2020 emphasizes that there is only a weak correlation between FEV1, symptoms and impairment of the health status of patients with chronic obstructive pulmonary disease (COPD). Various studies aimed to identify COPD phenotypes by cluster analyses, but behavioral aspects besides smoking were rarely included. METHODS The aims of the study were to investigate whether (i) clustering analyses are in line with the classification into GOLD ABCD groups; (ii) clustering according to Burgel et al. (Eur Respir J. 36(3):531-9, 2010) can be reproduced in a real-world COPD cohort; and (iii) addition of new behavioral variables alters the clustering outcome. Principal component and hierarchical cluster analyses were applied to real-world clinical data of COPD patients newly referred to secondary care (n = 155). We investigated if the obtained clusters paralleled GOLD ABCD subgroups and determined the impact of adding several variables, including quality of life (QOL), fatigue, satisfaction relationship, air trapping, steps per day and activities of daily living, on clustering. RESULTS Using the appropriate corresponding variables, we identified clusters that largely reflected the GOLD ABCD groups, but we could not reproduce Burgel's clinical phenotypes. Adding six new variables resulted in the formation of four new clusters that mainly differed from each other in the following parameters: number of steps per day, activities of daily living and QOL. CONCLUSIONS We could not reproduce previously identified clinical COPD phenotypes in an independent population of COPD patients. Our findings therefore indicate that COPD phenotypes based on cluster analysis may not be a suitable basis for treatment strategies for individual patients.
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Roche N, Devillier P, Berger P, Bourdin A, Dusser D, Muir JF, Martinat Y, Terrioux P, Housset B. Individual trajectory-based care for COPD: getting closer, but not there yet. ERJ Open Res 2021; 7:00451-2021. [PMID: 34912881 PMCID: PMC8666575 DOI: 10.1183/23120541.00451-2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/17/2021] [Indexed: 11/05/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a main cause of death due to interplaying factors, including comorbidities that interfere with symptoms and response to therapy. It is now admitted that COPD management should be based on clinical symptoms and health status and should consider the heterogeneity of patients' phenotypes and treatable traits. This precision medicine approach involves a regular assessment of the patient's status and of the expected benefits and risks of therapy. The cornerstone of COPD pharmacological therapy is inhaled long-acting bronchodilation. In patients with persistent or worsened symptoms, factors likely to interfere with treatment efficacy include the patient's non-adherence to therapy, treatment preference, inhaler misuse and/or comorbidities, which should be systematically investigated before escalation is considered. Several comorbidities are known to impact symptoms, physical and social activity and lung function. The possible long-term side-effects of inhaled corticosteroids contrasting with their over-prescription in COPD patients justify the regular assessment of their benefits and risks, and de-escalation under close monitoring after a sufficient period of stability is to be considered. While commonly used in clinical trials, the relevance of routine blood eosinophil counts to guide therapy adjustment is not fully clear. Patients' characteristics, which define phenotypes and treatable traits and thus guide therapy, often change during life, forming the basis of the concept of clinical trajectory. The application of individual trajectory-based management of COPD in clinical practice therefore implies that the benefit:risk ratio is regularly reviewed according to the evolution of the patient's traits over time to allow optimised therapy adjustments.
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Affiliation(s)
- Nicolas Roche
- Pneumologie, Hôpital Cochin, AP-HP. Centre - Université de Paris, Institut Cochin (UMR1016), Paris, France
| | - Philippe Devillier
- UPRES EA 220, Université Versailles Saint-Quentin, Pôle des Maladies des Voies Respiratoires, Hôpital Foch, Suresnes, France
| | - Patrick Berger
- Service d'exploration fonctionnelle respiratoire, CIC 1401, CHU de Bordeaux, Pessac, France
| | - Arnaud Bourdin
- Département de Pneumologie et Addictologie, Centre Hospitalier Universitaire de Montpellier, Montpellier, France
| | - Daniel Dusser
- Pneumologie, Hôpital Cochin, AP-HP. Centre - Université de Paris, Institut Cochin (UMR1016), Paris, France
| | - Jean-François Muir
- Service de Pneumologie, Oncologie Thoracique et Soins Intensifs Respiratoires, Centre Hospitalier Universitaire de Rouen, Rouen, France
| | | | | | - Bruno Housset
- Service de Pneumologie, Hôpital Intercommunal de Créteil, Créteil, France
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15
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Magalang UJ, Keenan BT. Symptom Subtypes in OSA: Ready for the Clinic? Chest 2021; 160:2003-2004. [PMID: 34872664 DOI: 10.1016/j.chest.2021.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 09/15/2021] [Accepted: 09/21/2021] [Indexed: 10/19/2022] Open
Affiliation(s)
- Ulysses J Magalang
- Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH.
| | - Brendan T Keenan
- Division of Sleep Medicine, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
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16
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Burke H, Wilkinson TMA. Unravelling the mechanisms driving multimorbidity in COPD to develop holistic approaches to patient-centred care. Eur Respir Rev 2021; 30:30/160/210041. [PMID: 34415848 DOI: 10.1183/16000617.0041-2021] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/06/2021] [Indexed: 01/04/2023] Open
Abstract
COPD is a major cause of morbidity and mortality worldwide. Multimorbidity is common in COPD patients and a key modifiable factor, which requires timely identification and targeted holistic management strategies to improve outcomes and reduce the burden of disease.We discuss the use of integrative approaches, such as cluster analysis and network-based theory, to understand the common and novel pathobiological mechanisms underlying COPD and comorbid disease, which are likely to be key to informing new management strategies.Furthermore, we discuss the current understanding of mechanistic drivers to multimorbidity in COPD, including hypotheses such as multimorbidity as a result of shared common exposure to noxious stimuli (e.g. tobacco smoke), or as a consequence of loss of function following the development of pulmonary disease. In addition, we explore the links to pulmonary disease processes such as systemic overspill of pulmonary inflammation, immune cell priming within the inflamed COPD lung and targeted messengers such as extracellular vesicles as a result of local damage as a cause for multimorbidity in COPD.Finally, we focus on current and new management strategies which may target these underlying mechanisms, with the aim of holistic, patient-centred treatment rather than single disease management.
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Affiliation(s)
- H Burke
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK .,University Hospitals Southampton NHS Foundation Trust, Southampton, UK
| | - T M A Wilkinson
- School of Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.,University Hospitals Southampton NHS Foundation Trust, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University Hospital Southampton, Southampton, UK
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17
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Zysman M, Deslee G, Perez T, Burgel PR, Le Rouzic O, Brinchault-Rabin G, Nesme-Meyer P, Court-Fortune I, Jebrak G, Chanez P, Caillaud D, Paillasseur JL, Roche N. Burden and Characteristics of Severe Chronic Hypoxemia in a Real-World Cohort of Subjects with COPD. Int J Chron Obstruct Pulmon Dis 2021; 16:1275-1284. [PMID: 34007166 PMCID: PMC8121159 DOI: 10.2147/copd.s295381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 03/31/2021] [Indexed: 11/23/2022] Open
Abstract
Background Chronic respiratory failure may occur as a consequence of chronic obstructive pulmonary disease (COPD) and is associated with significant morbidity and mortality. Hypoxemia is determined by underlying disease characteristics and comorbidities. Severe hypoxemia is typically only found in subjects with severe airflow obstruction (FEV1<50% predicted). However, how hypoxemia relates to disease characteristics is not fully understood. Methods In the French Initiatives BPCO real-life cohort, arterial blood gases were routinely collected in most patients. Relationships between severe hypoxemia, defined by a Pa02<60 mmHg (8 kPa) and clinical/lung function features, comorbidities and mortality were assessed. In subjects with severe hypoxemia, clinical characteristics and comorbidities were compared between those with non-severe versus severe airflow limitation. Classification and regression trees (CART) were used to define clinically relevant subgroups (phenotypes). Results Arterial blood gases were available from 887 subjects, of which 146 (16%) exhibited severe hypoxemia. Compared to subjects with a PaO2≥60 mmHg, the severe hypoxemia group exhibited higher mMRC dyspnea score, lower FEV1, higher RV and RV/TLC, more impaired quality of life, lower 6-minute walking distance, less frequent history of asthma, more frequent diabetes and higher 3-year mortality rate (14% versus 8%, p=0.026). Compared to subjects with Pa02<60 mmHg and FEV1<50% (n=115, 13%), those with severe hypoxemia but FEV1≥50% predicted (n=31) were older, had higher BMI, less hyperinflation, better quality of life and a higher rate of diabetes (29% versus 13%, p=0.02). Severe hypoxemia was better related to CART-defined phenotypes than to GOLD ABCD classification. Conclusion In this cohort of stable COPD subjects, severe hypoxemia was associated with worse prognosis and more severe symptoms, airflow limitation and hyperinflation. Compared to subjects with severe hypoxemia and severe airflow limitation, subjects with severe hypoxemia despite non-severe airflow limitation were older, had higher BMI and more diagnosed diabetes. Trial Registration 04–479.
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Affiliation(s)
- Maéva Zysman
- Pulmonary Department, Pôle Cardio-thoracique, CHU Haut-Lévèque, INSERM U1045, Bordeaux, France
| | - Gaëtan Deslee
- Pulmonary Department, Maison Blanche University Hospital, INSERM U01250, Reims, France
| | - Thierry Perez
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | - Pierre-Régis Burgel
- Respiratory Medicine, Cochin Hospital, AP-HP and Université de Paris, Institut Cochin, INSERM U1016, Paris, France
| | - Olivier Le Rouzic
- University Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France
| | | | | | | | - Gilles Jebrak
- Service de Pneumologie, Hôpital Bichat, AP-HP, Paris, France
| | - Pascal Chanez
- Département des Maladies Respiratoires, AP-HM, Université de la Méditerranée, Marseille, France
| | - Denis Caillaud
- Service de Pneumologie, Hôpital Gabriel Montpied, CHU, Clermont-Ferrand, France
| | | | - Nicolas Roche
- Respiratory Medicine, Cochin Hospital, AP-HP and Université de Paris, Institut Cochin, INSERM U1016, Paris, France
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18
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Zhao S, Wang P, Heidari AA, Chen H, Turabieh H, Mafarja M, Li C. Multilevel threshold image segmentation with diffusion association slime mould algorithm and Renyi's entropy for chronic obstructive pulmonary disease. Comput Biol Med 2021; 134:104427. [PMID: 34020128 DOI: 10.1016/j.compbiomed.2021.104427] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 01/11/2023]
Abstract
Image segmentation is an essential pre-processing step and is an indispensable part of image analysis. This paper proposes Renyi's entropy multi-threshold image segmentation based on an improved Slime Mould Algorithm (DASMA). First, we introduce the diffusion mechanism (DM) into the original SMA to increase the population's diversity so that the variants can better avoid falling into local optima. The association strategy (AS) is then added to help the algorithm find the optimal solution faster. Finally, the proposed algorithm is applied to Renyi's entropy multilevel threshold image segmentation based on non-local means 2D histogram. The proposed method's effectiveness is demonstrated on the Berkeley segmentation dataset and benchmark (BSD) by comparing it with some well-known algorithms. The DASMA-based multilevel threshold segmentation technique is also successfully applied to the CT image segmentation of chronic obstructive pulmonary disease (COPD). The experimental results are evaluated by image quality metrics, which show the proposed algorithm's extraordinary performance. This means that it can help doctors analyze the lesion tissue qualitatively and quantitatively, improve its diagnostic accuracy and make the right treatment plan. The supplementary material and info about this article will be available at https://aliasgharheidari.com.
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Affiliation(s)
- Songwei Zhao
- College of Computer Science and Artificial Intelligence, Wenzhou University, Wenzhou, Zhejiang, 325035, China.
| | - Pengjun Wang
- College of Electrical and Electronic Engineering, Wenzhou University, Wenzhou, 325035, China.
| | - Ali Asghar Heidari
- College of Computer Science and Artificial Intelligence, Wenzhou University, Wenzhou, Zhejiang, 325035, China; Department of Computer Science, School of Computing, National University of Singapore, Singapore.
| | - Huiling Chen
- College of Computer Science and Artificial Intelligence, Wenzhou University, Wenzhou, Zhejiang, 325035, China.
| | - Hamza Turabieh
- Department of Information Technology, College of Computers and Information Technology, P.O. Box11099, Taif, 21944, Taif University, Taif, Saudi Arabia.
| | - Majdi Mafarja
- Department of Computer Science, Birzeit University, Birzeit 72439, Palestine.
| | - Chengye Li
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000, China.
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Brat K, Svoboda M, Zatloukal J, Plutinsky M, Volakova E, Popelkova P, Novotna B, Dvorak T, Koblizek V. The Relation Between Clinical Phenotypes, GOLD Groups/Stages and Mortality in COPD Patients - A Prospective Multicenter Study. Int J Chron Obstruct Pulmon Dis 2021; 16:1171-1182. [PMID: 33953554 PMCID: PMC8089082 DOI: 10.2147/copd.s297087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/22/2021] [Indexed: 11/23/2022] Open
Abstract
Introduction The concept of phenotyping emerged, reflecting specific clinical, pulmonary and extrapulmonary features of each particular chronic obstructive pulmonary disease (COPD) case. Our aim was to analyze prognostic utility of: “Czech“ COPD phenotypes and their most frequent combinations, ”Spanish” phenotypes and Global Initiative for Chronic Obstructive Lung Disease (GOLD) stages + groups in relation to long-term mortality risk. Methods Data were extracted from the Czech Multicenter Research Database (CMRD) of COPD. Kaplan-Meier (KM) estimates (at 60 months from inclusion) were used for mortality assessment. Survival rates were calculated for the six elementary “Czech” phenotypes and their most frequent and relevant combinations, “Spanish” phenotypes, GOLD grades and groups. Statistically significant differences were tested by Log Rank test. An analysis of factors underlying mortality risk (the role of confounders) has been assessed with the use of classification and regression tree (CART) analysis. Basic factors showing significant differences between deceased and living patients were entered into the CART model. This showed six different risk groups, the differences in risk were tested by a Log Rank test. Results The cohort (n=720) was 73.1% men, with a mean age of 66.6 years and mean FEV1 44.4% pred. KM estimates showed bronchiectases/COPD overlap (HR 1.425, p=0.045), frequent exacerbator (HR 1.58, p<0.001), cachexia (HR 2.262, p<0.001) and emphysematous (HR 1.786, p=0.015) phenotypes associated with higher mortality risk. Co-presence of multiple phenotypes in a single patient had additive effect on risk; combination of emphysema, cachexia and frequent exacerbations translated into poorest prognosis (HR 3.075; p<0.001). Of the “Spanish” phenotypes, AE CB and AE non-CB were associated with greater risk of mortality (HR 1.787 and 2.001; both p=0.001). FEV1% pred., cachexia and chronic heart failure in patient history were the major underlying factors determining mortality risk in our cohort. Conclusion Certain phenotypes (“Czech” or “Spanish”) of COPD are associated with higher risk of death. Co-presence of multiple phenotypes (emphysematous plus cachectic plus frequent exacerbator) in a single individual was associated with amplified risk of mortality.
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Affiliation(s)
- Kristian Brat
- Department of Respiratory Diseases, University Hospital Brno, Brno, Czech Republic.,Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Michal Svoboda
- Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Institute of Biostatistics and Analyses, Ltd., Brno, Czech Republic
| | - Jaromir Zatloukal
- Pulmonary Department, University Hospital Olomouc, Olomouc, Czech Republic.,Faculty of Medicine, Palacky University, Olomouc, Czech Republic
| | - Marek Plutinsky
- Department of Respiratory Diseases, University Hospital Brno, Brno, Czech Republic.,Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Eva Volakova
- Pulmonary Department, University Hospital Olomouc, Olomouc, Czech Republic.,Faculty of Medicine, Palacky University, Olomouc, Czech Republic
| | - Patrice Popelkova
- Pulmonary Department, University Hospital Ostrava, Ostrava, Czech Republic.,Faculty of Medicine, University of Ostrava, Ostrava, Czech Republic
| | - Barbora Novotna
- Pulmonary Department, Bulovka Hospital, Prague, Czech Republic
| | - Tomas Dvorak
- Pulmonary Department, Mlada Boleslav Hospital, Mlada Boleslav, Czech Republic
| | - Vladimir Koblizek
- Pulmonary Department, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.,Faculty of Medicine in Hradec Kralove, Charles University, Prague, Czech Republic
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20
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Perez-Benzo GM, Muellers K, Chen S, Liu B, Bagiella E, O'Conor R, Wolf MS, Wisnivesky JP, Federman AD. Identifying Behavioral Phenotypes in Chronic Illness: Self-Management of COPD and Comorbid Hypertension. Patient Educ Couns 2021; 104:627-633. [PMID: 32921518 PMCID: PMC7914263 DOI: 10.1016/j.pec.2020.08.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 07/27/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
OBJECTIVES To identify and characterize the constellation, or clusters, of self-management behaviors in patients with chronic obstructive pulmonary disease (COPD) and comorbid hypertension. METHODS Cluster analysis (n = 204) was performed with standardized scores for medication adherence to COPD and hypertension medications, inhaler technique, and diet as well as self-reported information on physical activity, appointment keeping, smoking status, and yearly influenza vaccination for a total of eight variables. Classification and regression tree analysis (CART) was performed to further characterize the resulting clusters. RESULTS Patients were divided into three clusters based on eight self-management behaviors, which included 95 patients in cluster 1, 42 in cluster 2, and 67 in cluster 3. All behaviors except for inhaler technique differed significantly among the three clusters (P's<0.005). CART indicated physical activity was the first differentiating variable. CONCLUSIONS Patients with COPD and hypertensioncan be separated into those with adequate and inadequate adherence. The group with inadequate adherence can further be divided into those with poor adherence to medical behaviors compared to those with poor adherence to lifestyle behaviors. PRACTICE IMPLICATIONS Once validated in other populations, the identification of patient clusters using patient self-management behaviors could be used to inform interventions for patients with multimorbidity.
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Affiliation(s)
| | - Kimberly Muellers
- Department of Psychology, Pace University, New York, NY, United States
| | - Shiqi Chen
- ISO, Verisk Analytics, Jersey City, NJ, United States
| | - Bian Liu
- Institute for Translational Epidemiology, Department of Population Health Science and Policy, The Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Emilia Bagiella
- International Center for Health Outcomes and Innovation Research, the Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Rachel O'Conor
- Division of General Internal Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Michael S Wolf
- Division of General Internal Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Juan P Wisnivesky
- Division of Pulmonary and Critical Care Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States; Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Alex D Federman
- Division of General Internal Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States.
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Feng Y, Wang Y, Zeng C, Mao H. Artificial Intelligence and Machine Learning in Chronic Airway Diseases: Focus on Asthma and Chronic Obstructive Pulmonary Disease. Int J Med Sci 2021; 18:2871-2889. [PMID: 34220314 PMCID: PMC8241767 DOI: 10.7150/ijms.58191] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/20/2021] [Indexed: 02/05/2023] Open
Abstract
Chronic airway diseases are characterized by airway inflammation, obstruction, and remodeling and show high prevalence, especially in developing countries. Among them, asthma and chronic obstructive pulmonary disease (COPD) show the highest morbidity and socioeconomic burden worldwide. Although there are extensive guidelines for the prevention, early diagnosis, and rational treatment of these lifelong diseases, their value in precision medicine is very limited. Artificial intelligence (AI) and machine learning (ML) techniques have emerged as effective methods for mining and integrating large-scale, heterogeneous medical data for clinical practice, and several AI and ML methods have recently been applied to asthma and COPD. However, very few methods have significantly contributed to clinical practice. Here, we review four aspects of AI and ML implementation in asthma and COPD to summarize existing knowledge and indicate future steps required for the safe and effective application of AI and ML tools by clinicians.
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Affiliation(s)
- Yinhe Feng
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China.,Department of Respiratory and Critical Care Medicine, People's Hospital of Deyang City, Affiliated Hospital of Chengdu College of Medicine, Deyang, Sichuan Province, China
| | - Yubin Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
| | - Chunfang Zeng
- Department of Respiratory and Critical Care Medicine, People's Hospital of Deyang City, Affiliated Hospital of Chengdu College of Medicine, Deyang, Sichuan Province, China
| | - Hui Mao
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan Province, China
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22
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Momenzadeh N, Hafezalseheh H, Nayebpour M, Fathian M, Noorossana R. A hybrid machine learning approach for predicting survival of patients with prostate cancer: A SEER-based population study. Informatics in Medicine Unlocked 2021. [DOI: 10.1016/j.imu.2021.100763] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Abstract
Chronic obstructive pulmonary disease (COPD) is a complex disease manifested primarily as airflow limitation that is partially reversible as confirmed by spirometry. COPD patients frequently develop systemic manifestations, such as skeletal muscle wasting and cachexia. COPD patients often develop other comorbid diseases, such as ischemic heart disease, heart failure, osteoporosis, anemia, lung cancer, and depression. Comorbidities complicate management of COPD and need to be evaluated because detection and treatment have important consequences. Novel approaches aimed at integrating the multiple morbidities seen in COPD and other chronic diseases will provide new avenues of research and allow developing more comprehensive and effective therapeutic approaches.
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Zucchi JW, Franco EAT, Schreck T, Castro e Silva MH, Migliorini SRDS, Garcia T, Mota GAF, de Morais BEB, Machado LHS, Batista ANR, de Paiva SAR, de Godoy I, Tanni SE. Different Clusters in Patients with Chronic Obstructive Pulmonary Disease (COPD): A Two-Center Study in Brazil. Int J Chron Obstruct Pulmon Dis 2020; 15:2847-2856. [PMID: 33192058 PMCID: PMC7654519 DOI: 10.2147/copd.s268332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 09/06/2020] [Indexed: 11/23/2022] Open
Abstract
Background Chronic obstructive pulmonary disease (COPD) has a functional definition. However, differences in clinical characteristics and systemic manifestations make COPD a heterogeneous disease and some manifestations have been associated with different risks of acute exacerbations, hospitalizations, and death. Objective Therefore, the objective of the study was to evaluate possible clinical clusters in COPD at two study centers in Brazil and identify the associated exacerbation and mortality rate during 1 year of follow-up. Methods We included patients with COPD and all underwent an evaluation composed of the Charlson Index, body mass index (BMI), current pharmacological treatment, smoking history (packs-year), history of exacerbations/hospitalizations in the last year, spirometry, six-minute walking test (6MWT), quality of life questionnaires, dyspnea, and hospital anxiety and depression scale. Blood samples were also collected for measurements of C-reactive protein (CRP), blood gases, laboratory analysis, and blood count. For the construction of the clusters, 13 continuous variables of clinical importance were considered: hematocrit, CRP, triglycerides, low density lipoprotein, absolute number of peripheral eosinophils, age, pulse oximetry, BMI, forced expiratory volume in the first second, dyspnea, 6MWD, total score of the Saint George Respiratory Questionnaire and packs-year of smoking. We used the Ward and K-means methods and determined the best silhouette value to identify similarities of individuals within the cluster (cohesion) in relation to the other clusters (separation). The number of clusters was determined by the heterogeneity values of the cluster, which in this case was determined as four clusters. Results We evaluated 301 COPD patients and identified four different groups of COPD patients. The first cluster (203 patients) was characterized by fewer symptoms and lower functional severity of the disease, the second cluster by higher values of peripheral eosinophils, the third cluster by more systemic inflammation and the fourth cluster by greater obstructive severity and worse gas exchange. Cluster 2 had an average of 959±3 peripheral eosinophils, cluster 3 had a higher prevalence of nutritional depletion (46.1%), and cluster 4 had a higher BODE index. Regarding the associated comorbidities, we found that only obstructive sleep apnea syndrome and pulmonary thromboembolism were more prevalent in cluster 4. Almost 50% of all patients presented an exacerbation during 1 year of follow-up. However, it was higher in cluster 4, with 65% of all patients having at least one exacerbation. The mortality rate was statistically higher in cluster 4, with 26.9%, vs 9.6% in cluster 1. Conclusion We could identify four clinical different clusters in these COPD populations, that were related to different clinical manifestations, comorbidities, exacerbation, and mortality rate. We also identified a specific cluster with higher values of peripheral eosinophils.
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Affiliation(s)
- José William Zucchi
- Pulmonology Division of Botucatu Medical School, São Paulo State University (UNESP), Botucatu, Brazil
| | | | - Thomas Schreck
- Ostbayerische Technische Hochschule Regensburg (OTH Regensburg), Faculty of Business Studies, Regensburg, German
| | | | | | - Thaís Garcia
- Pulmonology Division of Botucatu Medical School, São Paulo State University (UNESP), Botucatu, Brazil
| | | | | | | | | | | | - Irma de Godoy
- Pulmonology Division of Botucatu Medical School, São Paulo State University (UNESP), Botucatu, Brazil
| | - Suzana Erico Tanni
- Pulmonology Division of Botucatu Medical School, São Paulo State University (UNESP), Botucatu, Brazil
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25
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García Castillo E, Alonso Pérez T, Ancochea J, Pastor Sanz MT, Almagro P, Martínez-Camblor P, Miravitlles M, Rodríguez-Carballeira M, Navarro A, Lamprecht B, Ramírez-García Luna AS, Kaiser B, Alfageme I, Casanova C, Esteban C, Soler-Cataluña JJ, de-Torres JP, Celli BR, Marín JM, Ter Riet G, Sobradillo P, Lange P, Garcia-Aymerich J, Anto JM, Turner AM, Han MK, Langhammer A, Vikjord SAA, Sternberg A, Leivseth L, Bakke P, Johannessen A, Oga T, Cosío BG, Echazarreta A, Roche N, Burgel PR, Sin DD, Puhan MA, López-Campos JL, Carrasco L, Soriano JB. Mortality prediction in chronic obstructive pulmonary disease comparing the GOLD 2015 and GOLD 2019 staging: a pooled analysis of individual patient data. ERJ Open Res 2020; 6:00253-2020. [PMID: 33263033 PMCID: PMC7682666 DOI: 10.1183/23120541.00253-2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/31/2020] [Indexed: 01/24/2023] Open
Abstract
In 2019, The Global Initiative for Chronic Obstructive Lung Disease (GOLD) modified the grading system for patients with COPD, creating 16 subgroups (1A–4D). As part of the COPD Cohorts Collaborative International Assessment (3CIA) initiative, we aim to compare the mortality prediction of the 2015 and 2019 COPD GOLD staging systems. We studied 17 139 COPD patients from the 3CIA study, selecting those with complete data. Patients were classified by the 2015 and 2019 GOLD ABCD systems, and we compared the predictive ability for 5-year mortality of both classifications. In total, 17 139 patients with COPD were enrolled in 22 cohorts from 11 countries between 2003 and 2017; 8823 of them had complete data and were analysed. Mean±sd age was 63.9±9.8 years and 62.9% were male. GOLD 2019 classified the patients in milder degrees of COPD. For both classifications, group D had higher mortality. 5-year mortality did not differ between groups B and C in GOLD 2015; in GOLD 2019, mortality was greater for group B than C. Patients classified as group A and B had better sensitivity and positive predictive value with the GOLD 2019 classification than GOLD 2015. GOLD 2015 had better sensitivity for group C and D than GOLD 2019. The area under the curve values for 5-year mortality were only 0.67 (95% CI 0.66–0.68) for GOLD 2015 and 0.65 (95% CI 0.63–0.66) for GOLD 2019. The new GOLD 2019 classification does not predict mortality better than the previous GOLD 2015 system. GOLD 2019 staging system created 16 subgroups. GOLD 2015 and GOLD 2019 are not strong predictors of mortality, and do not have sufficient discriminatory power to be used as a tool for risk classification of mortality in patients with COPD.https://bit.ly/3idBuaN
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Affiliation(s)
- Elena García Castillo
- Pneumology Dept, Hospital Universitario de la Princesa, Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain.,These authors contributed equally
| | - Tamara Alonso Pérez
- Pneumology Dept, Hospital Universitario de la Princesa, Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain.,These authors contributed equally
| | - Julio Ancochea
- Pneumology Dept, Hospital Universitario de la Princesa, Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Maria Teresa Pastor Sanz
- Pneumology Dept, Hospital Universitario de la Princesa, Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain
| | - Pere Almagro
- Internal Medicine Department, Mútua Terrassa University Hospital, Barcelona, Spain
| | | | - Marc Miravitlles
- Pneumology Dept, Hospital Universitary Vall d'Hebron, CIBER de Enfermedades Respiratorias (CIBERES), Barcelona, Spain
| | | | - Annie Navarro
- Pneumology Service, Hospital Universitari Mútua Terrassa, Barcelona, Spain
| | - Bernd Lamprecht
- Dept of Pulmonary Medicine, Kepler-University-Hospital, Faculty of Medicine, Johannes-Kepler-University Linz, Linz, Austria
| | | | - Bernhard Kaiser
- Dept of Pulmonary Medicine, Paracelsus Medical University Hospital, Salzburg, Austria
| | - Inmaculada Alfageme
- Departamento de Medicina, Universidad de Sevilla, HU Virgen de Valme, Seville, Spain
| | - Ciro Casanova
- Pulmonary Department, Research Unit, Hospital Universitario Nuestra Señora de La Candelaria, Universidad de La Laguna, Tenerife, Spain
| | - Cristóbal Esteban
- Pulmonary Department, Research Unit, Hospital Universitario Nuestra Señora de La Candelaria, Universidad de La Laguna, Tenerife, Spain
| | | | - Juan P de-Torres
- Clinica Universidad de Navarra, Pamplona, Spain.,Respirology and Sleep Medicine Division, Queen's University, Kingston, Canada
| | - Bartolomé R Celli
- Pulmonary and Critical Care Medicine, Harvard University, Brigham and Women's Hospital, Boston, MA, USA
| | - Jose M Marín
- Hospital Universitario Miguel Servet, Zaragoza, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
| | - Gerben Ter Riet
- Urban Vitality - Centre of Expertise, Faculty of Health, Amsterdam University of Applied Sciences, Amsterdam, The Netherlands.,Dept of Cardiology, Amsterdam UMC, location Academic Medical Center, Amsterdam, The Netherlands
| | | | - Peter Lange
- Section of Social Medicine, Dept of Public Health, Copenhagen University, Copenhagen City Heart Study, Frederiksberg Hospital, Copenhagen, Denmark
| | - Judith Garcia-Aymerich
- ISGlobal, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Josep M Anto
- ISGlobal, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Alice M Turner
- Institute of Applied Health Research, University of Birmingham, Edgbaston, UK
| | - MeiLan K Han
- Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Arnulf Langhammer
- Dept of Public Health and Nursing, NTNU (Norwegian University of Science and Technology), Trondheim, Norway.,Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA.,Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway
| | | | - Alice Sternberg
- Dept of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Linda Leivseth
- Centre for Clinical Documentation and Evaluation, Northern Norway Regional Health Authority, Tromso, Norway
| | - Per Bakke
- Dept of Clinical Science, University of Bergen, Bergen, Norway
| | - Ane Johannessen
- Dept of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Toru Oga
- Dept of Respiratory Care and Sleep Control Medicine, Kyoto University, Kyoto, Japan
| | - Borja G Cosío
- Hospital Universitario Son Espases-IdISPa, Mallorca, Spain
| | - Andrés Echazarreta
- Servicio de Neumonología, Hospital San Juan de Dios de La Plata, Buenos Aires, Argentina
| | - Nicolás Roche
- Respiratory Medicine, Cochin Hospital, APHP Centre-University of Paris, Cochin Institute (INSERM UMR1016), Paris, France
| | - Pierre-Régis Burgel
- Respiratory Medicine, Cochin Hospital, APHP Centre-University of Paris, Cochin Institute (INSERM UMR1016), Paris, France
| | - Don D Sin
- UBC Centre for Heart Lung Innovation, Vancouver, BC, Canada.,Division of Respiratory Medicine, Dept of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Milo A Puhan
- Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Jose Luis López-Campos
- Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain.,Unidad Médico Quirúrgica de Enfermedades Respiratorias, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain
| | - Laura Carrasco
- Unidad Médico Quirúrgica de Enfermedades Respiratorias, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/Universidad de Sevilla, Seville, Spain
| | - Joan B Soriano
- Pneumology Dept, Hospital Universitario de la Princesa, Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, Spain
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Zahraei HN, Guissard F, Paulus V, Henket M, Donneau AF, Louis R. Comprehensive Cluster Analysis for COPD Including Systemic and Airway Inflammatory Markers. COPD 2020; 17:672-683. [PMID: 33092418 DOI: 10.1080/15412555.2020.1833853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is a complex, multidimensional and heterogeneous disease. The main purpose of the present study was to identify clinical phenotypes through cluster analysis in adults suffering from COPD. A retrospective study was conducted on 178 COPD patients in stable state recruited from ambulatory care at University hospital of Liege. All patients were above 40 years, had a smoking history of more than 20 pack years, post bronchodilator FEV1/FVC <70% and denied any history of asthma before 40 years. In this study, the patients were described by a total of 84 mixed sets of variables with some missing values. Hierarchical clustering on principal components (HCPC) was applied on multiple imputation. In the final step, patients were classified into homogeneous distinct groups by consensus clustering. Three different clusters, which shared similar smoking history were found. Cluster 1 included men with moderate airway obstruction (n = 67) while cluster 2 comprised men who were exacerbation-prone, with severe airflow limitation and intense granulocytic airway and neutrophilic systemic inflammation (n = 56). Cluster 3 essentially included women with moderate airway obstruction (n = 55). All clusters had a low rate of bacterial colonization (5%), a low median FeNO value (<20 ppb) and a very low sensitization rate toward common aeroallergens (0-5%). CAT score did not differ between clusters. Including markers of systemic airway inflammation and atopy and applying a comprehensive cluster analysis we provide here evidence for 3 clusters markedly shaped by sex, airway obstruction and neutrophilic inflammation but not by symptoms and T2 biomarkers.
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Affiliation(s)
- Halehsadat Nekoee Zahraei
- Biostatistics Unit, Department of Public Health, University of Liège, Liège, Belgium.,Department of Pneumology, GIGA, University of Liège, Liège, Belgium
| | | | - Virginie Paulus
- Department of Pneumology, GIGA, University of Liège, Liège, Belgium
| | - Monique Henket
- Department of Pneumology, GIGA, University of Liège, Liège, Belgium
| | | | - Renaud Louis
- Department of Pneumology, GIGA, University of Liège, Liège, Belgium
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Nikolaou V, Massaro S, Fakhimi M, Stergioulas L, Price D. COPD phenotypes and machine learning cluster analysis: A systematic review and future research agenda. Respir Med 2020; 171:106093. [PMID: 32745966 DOI: 10.1016/j.rmed.2020.106093] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 07/19/2020] [Accepted: 07/21/2020] [Indexed: 12/21/2022]
Abstract
Chronic Obstructive Pulmonary Disease (COPD) is a highly heterogeneous condition projected to become the third leading cause of death worldwide by 2030. To better characterize this condition, clinicians have classified patients sharing certain symptomatic characteristics, such as symptom intensity and history of exacerbations, into distinct phenotypes. In recent years, the growing use of machine learning algorithms, and cluster analysis in particular, has promised to advance this classification through the integration of additional patient characteristics, including comorbidities, biomarkers, and genomic information. This combination would allow researchers to more reliably identify new COPD phenotypes, as well as better characterize existing ones, with the aim of improving diagnosis and developing novel treatments. Here, we systematically review the last decade of research progress, which uses cluster analysis to identify COPD phenotypes. Collectively, we provide a systematized account of the extant evidence, describe the strengths and weaknesses of the main methods used, identify gaps in the literature, and suggest recommendations for future research.
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Affiliation(s)
- Vasilis Nikolaou
- Surrey Business School, University of Surrey, Guildford, GU2 7HX, UK.
| | - Sebastiano Massaro
- Surrey Business School, University of Surrey, Guildford, GU2 7HX, UK; The Organizational Neuroscience Laboratory, London, WC1N 3AX, UK
| | - Masoud Fakhimi
- Surrey Business School, University of Surrey, Guildford, GU2 7HX, UK
| | | | - David Price
- Observational and Pragmatic Research Institute, Singapore, Singapore; Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
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28
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Divo MJ, Marin Oto M, Casanova Macario C, Cabrera Lopez C, de-Torres JP, Marin Trigo JM, Hersh CP, Ezponda Casajús A, Maguire C, Pinto-Plata VM, Polverino F, Ross JC, DeMeo D, Bastarrika G, Silverman EK, Celli BR. Somatotypes trajectories during adulthood and their association with COPD phenotypes. ERJ Open Res 2020; 6:00122-2020. [PMID: 32963991 PMCID: PMC7487345 DOI: 10.1183/23120541.00122-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/15/2020] [Indexed: 11/21/2022] Open
Abstract
RATIONALE Chronic obstructive pulmonary disease (COPD) comprises distinct phenotypes, all characterised by airflow limitation. OBJECTIVES We hypothesised that somatotype changes - as a surrogate of adiposity - from early adulthood follow different trajectories to reach distinct phenotypes. METHODS Using the validated Stunkard's Pictogram, 356 COPD patients chose the somatotype that best reflects their current body build and those at ages 18, 30, 40 and 50 years. An unbiased group-based trajectory modelling was used to determine somatotype trajectories. We then compared the current COPD-related clinical and phenotypic characteristics of subjects belonging to each trajectory. MEASUREMENTS AND MAIN RESULTS At 18 years of age, 88% of the participants described having a lean or medium somatotype (estimated body mass index (BMI) between 19 and 23 kg·m-2) while the other 12% a heavier somatotype (estimated BMI between 25 and 27 kg·m-2). From age 18 onwards, five distinct trajectories were observed. Four of them demonstrating a continuous increase in adiposity throughout adulthood with the exception of one, where the initial increase was followed by loss of adiposity after age 40. Patients with this trajectory were primarily females with low BMI and D LCO (diffusing capacity of the lung for carbon monoxide). A persistently lean trajectory was seen in 14% of the cohort. This group had significantly lower forced expiratory volume in 1 s (FEV1), D LCO, more emphysema and a worse BODE (BMI, airflow obstruction, dyspnoea and exercise capacity) score thus resembling the multiple organ loss of tissue (MOLT) phenotype. CONCLUSIONS COPD patients have distinct somatotype trajectories throughout adulthood. Those with the MOLT phenotype maintain a lean trajectory throughout life. Smoking subjects with this lean phenotype in early adulthood deserve particular attention as they seem to develop more severe COPD.
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Affiliation(s)
- Miguel J. Divo
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Marta Marin Oto
- Pulmonary Dept, Clinica Universidad de Navarra, Pamplona, Spain
| | - Ciro Casanova Macario
- Pulmonary Dept and Research Unit, Hospital Universitario La Candelaria, Universidad de La Laguna, Santa Cruz de Tenerife, Spain
| | - Carlos Cabrera Lopez
- Respiratory Service, Hospital Universitario de Gran Canaria Dr. Negrin, Canary Islands, Spain
| | | | - Jose Maria Marin Trigo
- Respiratory Service, Hospital Universitario Miguel Servet, Zaragoza, Spain
- CIBER Enfermedades Respiratorias, Instituto Investigación Sanitaria, Madrid, Spain
| | - Craig P. Hersh
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Channing Division of Network Medicine, Boston, MA, USA
| | | | | | | | - Francesca Polverino
- Asthma and Airway Disease Research Center, University of Arizona, Tucson, NM, USA
| | - James C. Ross
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Dawn DeMeo
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Channing Division of Network Medicine, Boston, MA, USA
| | - Gorka Bastarrika
- Dept of Radiology, Clinica Universidad de Navarra, Pamplona, Spain
| | - Edwin K. Silverman
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Channing Division of Network Medicine, Boston, MA, USA
| | - Bartolome R. Celli
- Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Occhipinti M, Paoletti M, Crapo JD, Make BJ, Lynch DA, Brusasco V, Lavorini F, Silverman EK, Regan EA, Pistolesi M. Validation of a method to assess emphysema severity by spirometry in the COPDGene study. Respir Res 2020; 21:103. [PMID: 32357885 PMCID: PMC7195744 DOI: 10.1186/s12931-020-01366-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 04/20/2020] [Indexed: 12/15/2022] Open
Abstract
Background Standard spirometry cannot identify the predominant mechanism underlying airflow obstruction in COPD, namely emphysema or airway disease. We aimed at validating a previously developed methodology to detect emphysema by mathematical analysis of the maximal expiratory flow-volume (MEFV) curve in standard spirometry. Methods From the COPDGene population we selected those 5930 subjects with MEFV curve and inspiratory-expiratory CT obtained on the same day. The MEFV curve descending limb was fit real-time using forced vital capacity (FVC), peak expiratory flow, and forced expiratory flows at 25, 50 and 75% of FVC to derive an emphysema severity index (ESI), expressed as a continuous positive numeric parameter ranging from 0 to 10. According to inspiratory CT percent lung attenuation area below − 950 HU we defined three emphysema severity subgroups (%LAA-950insp < 6, 6–14, ≥14). By co-registration of inspiratory-expiratory CT we quantified persistent (%pLDA) and functional (%fLDA) low-density areas as CT metrics of emphysema and airway disease, respectively. Results ESI differentiated CT emphysema severity subgroups increasing in parallel with GOLD stages (p < .001), but with high variability within each stage. ESI had significantly higher correlations (p < .001) with emphysema than with airway disease CT metrics, explaining 67% of %pLDA variability. Conversely, standard spirometric variables (FEV1, FEV1/FVC) had significantly lower correlations than ESI with emphysema CT metrics and did not differentiate between emphysema and airways CT metrics. Conclusions ESI adds to standard spirometry the power to discriminate whether emphysema is the predominant mechanism of airway obstruction. ESI methodology has been validated in the large multiethnic population of smokers of the COPDGene study and therefore it could be applied for clinical and research purposes in the general population of smokers, using a readily available online website.
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Affiliation(s)
- Mariaelena Occhipinti
- Section of Respiratory Medicine, Department of Experimental and Clinical Medicine, University of Florence, Largo A. Brambilla 3, 50134, Florence, Italy. .,Section of Radiology, Department of Biomedical, Experimental, and Clinical Sciences, University of Florence, Largo A. Brambilla 3, 50134, Florence, Italy.
| | - Matteo Paoletti
- Section of Respiratory Medicine, Department of Experimental and Clinical Medicine, University of Florence, Largo A. Brambilla 3, 50134, Florence, Italy
| | - James D Crapo
- Department of Medicine, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Barry J Make
- Department of Medicine, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - David A Lynch
- Department of Radiology, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Vito Brusasco
- Department of Experimental Medicine, University of Genoa, Via Leon Battista Alberti 2, 16132, Genoa, Italy
| | - Federico Lavorini
- Section of Respiratory Medicine, Department of Experimental and Clinical Medicine, University of Florence, Largo A. Brambilla 3, 50134, Florence, Italy
| | - Edwin K Silverman
- Department of Medicine, Harvard Medical School, Brigham and Women's Hospital, Channing Division of Network Medicine, 75 Francis St, Boston, MA 02115, USA
| | - Elizabeth A Regan
- Department of Medicine, National Jewish Health, 1400 Jackson St, Denver, CO 80206, USA
| | - Massimo Pistolesi
- Section of Respiratory Medicine, Department of Experimental and Clinical Medicine, University of Florence, Largo A. Brambilla 3, 50134, Florence, Italy
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30
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Kim SJ, Alnakhli WM, Alfaraj AS, Kim KA, Kim SW, Liu SYC. Multi-perspective clustering of obstructive sleep apnea towards precision therapeutic decision including craniofacial intervention. Sleep Breath 2020; 25:85-94. [PMID: 32219710 DOI: 10.1007/s11325-020-02062-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 02/18/2020] [Accepted: 03/13/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE Previous studies focusing on phenotyping obstructive sleep apnea (OSA) have outlined its heterogeneity in clinical symptoms, comorbidities, and polysomnographic features. However, the role of anatomical or pathophysiological causality including craniofacial skeletal deformity has not been studied. We aimed to identify and characterize phenotypes of OSA based on multi-perspective clustering by incorporating craniofacial risks with obesity, apnea severity, arousability, symptom, and comorbidity. METHODS A total of 421 Korean patients with OSA (apnea-hypopnea index, AHI ≥ 5; age ≥ 20 years old) were recruited. A K-means cluster analysis was performed following principal component analysis with sagittal and vertical skeletal variables (ANB and mandibular plane angle), AHI, body mass index, and Epworth sleepiness scale. Inter-cluster comparison was conducted using demographic, cephalometric, and polysomnographic variables in addition to presence of diabetes and hypertension. Risk factors contributing to OSA severity were evaluated in each cluster using multivariable regression analysis with adjustment for age and gender. RESULTS Three phenotypic clusters were identified and characterized as follows: Cluster-1 (noncraniofacial phenotype, 39%), non-obese moderate-to-severe OSA with no skeletal discrepancy representing low arousal threshold (ArTh), little sleepiness, and low comorbidity; Cluster-2 (craniofacial skeletal phenotype, 33%), non-obese moderate OSA with definite skeletal discrepancy showing low ArTh, mild sleepiness, and low comorbidity; and Cluster-3 (complicated phenotype, 28%), obese severe OSA with skeletal discrepancy exhibiting high ArTh, excessive daytime sleepiness, and high incidence of hypertension. CONCLUSIONS The three OSA phenotypes from multi-perspective clustering may provide a basis for precise therapeutic decision-making including craniofacial skeletal intervention beyond usual characterization of OSA subgroups.
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Affiliation(s)
- Su-Jung Kim
- Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, South Korea.
| | | | - Ali Saeed Alfaraj
- Department of Orthodontics, Kyung Hee University Dental Hospital, Seoul, South Korea
| | - Kyung-A Kim
- Department of Orthodontics, School of Dentistry, Kyung Hee University, Seoul, South Korea
| | - Sung-Wan Kim
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - Stanley Yung-Chuan Liu
- Division of Sleep Surgery, Department of Otolaryngology, Stanford University school of Medicine, Stanford, CA, USA
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Cruthirds CL, van der Meij BS, Wierzchowska-McNew A, Deutz NEP, Engelen MPKJ. Presence or Absence of Skeletal Muscle Dysfunction in Chronic Obstructive Pulmonary Disease is Associated With Distinct Phenotypes. Arch Bronconeumol 2021; 57:264-72. [PMID: 32115277 DOI: 10.1016/j.arbres.2019.12.034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 12/19/2019] [Accepted: 12/31/2019] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Reduced skeletal muscle function and cognitive performance are common extrapulmonary features in Chronic Obstructive Pulmonary Disease (COPD) but their connection remains unclear. Whether presence or absence of skeletal muscle dysfunction in COPD patients is linked to a specific phenotype consisting of reduced cognitive performance, comorbidities and nutritional and metabolic disturbances needs further investigation. METHODS Thirty-seven patients with COPD (grade II-IV) were divided into two phenotypic cohorts based on the presence (COPD dysfunctional, n=25) or absence (COPD functional, n=12) of muscle dysfunction. These cohorts were compared to 28 healthy, age matched controls. Muscle strength (dynamometry), cognitive performance (Trail Making Test and STROOP Test), body composition (Dual-energy X-Ray Absorptiometry), habitual physical activity, comorbidities and mood status (questionnaires) were measured. Pulse administration of stable amino acid tracers was performed to measure whole body production rates. RESULTS Presence of muscle dysfunction in COPD was independent of muscle mass or severity of airflow obstruction but associated with impaired STROOP Test performance (p=0.04), reduced resting O2 saturation (p=0.003) and physical inactivity (p=0.01), and specific amino acid metabolic disturbances (enhanced leucine (p=0.02) and arginine (p=0.06) production). In contrast, COPD patients with normal muscle function presented with anxiety, increased fat mass, plasma glucose concentration, and metabolic syndrome related comorbidities (hypertension and dyslipidemia). CONCLUSION COPD patients with muscle dysfunction show characteristics of a cognitive - metabolic impairment phenotype, influenced by the presence of hypoxia, whereas those with normal muscle function present a phenotype of metabolic syndrome and mood disturbances.
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Tiew PY, Ko FWS, Narayana JK, Poh ME, Xu H, Neo HY, Loh LC, Ong CK, Mac Aogáin M, Tan JHY, Kamaruddin NH, Sim GJH, Lapperre TS, Koh MS, Hui DSC, Abisheganaden JA, Tee A, Tsaneva-Atanasova K, Chotirmall SH. "High-Risk" Clinical and Inflammatory Clusters in COPD of Chinese Descent. Chest 2020; 158:145-156. [PMID: 32092320 DOI: 10.1016/j.chest.2020.01.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/10/2019] [Accepted: 01/12/2020] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND COPD is a heterogeneous disease demonstrating inter-individual variation. A high COPD prevalence in Chinese populations is described, but little is known about disease clusters and prognostic outcomes in the Chinese population across Southeast Asia. We aim to determine if clusters of Chinese patients with COPD exist and their association with systemic inflammation and clinical outcomes. RESEARCH QUESTION We aim to determine if clusters of Chinese patients with COPD exist and their association with clinical outcomes and inflammation. STUDY DESIGN AND METHODS Chinese patients with stable COPD were prospectively recruited into two cohorts (derivation and validation) from six hospitals across three Southeast Asian countries (Singapore, Malaysia, and Hong Kong; n = 1,480). Each patient was followed more than 2 years. Clinical data (including co-morbidities) were employed in unsupervised hierarchical clustering (followed by validation) to determine the existence of patient clusters and their prognostic outcome. Accompanying systemic cytokine assessments were performed in a subset (n = 336) of patients with COPD to determine if inflammatory patterns and associated networks characterized the derived clusters. RESULTS Five patient clusters were identified including: (1) ex-TB, (2) diabetic, (3) low comorbidity: low-risk, (4) low comorbidity: high-risk, and (5) cardiovascular. The cardiovascular and ex-TB clusters demonstrate highest mortality (independent of Global Initiative for Chronic Obstructive Lung Disease assessment) and illustrate diverse cytokine patterns with complex inflammatory networks. INTERPRETATION We describe clusters of Chinese patients with COPD, two of which represent high-risk clusters. The cardiovascular and ex-TB patient clusters exhibit high mortality, significant inflammation, and complex cytokine networks. Clinical and inflammatory risk stratification of Chinese patients with COPD should be considered for targeted intervention to improve disease outcomes.
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Affiliation(s)
- Pei Yee Tiew
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore
| | - Fanny Wai San Ko
- Department of Medicine and Therapeutics The Chinese University of Hong Kong, Hong Kong
| | - Jayanth Kumar Narayana
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Indian Institute of Science Education and Research, Pune, India
| | - Mau Ern Poh
- Department of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Huiying Xu
- Department of Respiratory and Critical Care Medicine, Tan Tock Seng Hospital, Singapore
| | - Han Yee Neo
- Department of Respiratory and Critical Care Medicine, Tan Tock Seng Hospital, Singapore
| | - Li-Cher Loh
- Department of Medicine, RCSI-UCD Malaysia Campus, Georgetown, Penang, Malaysia
| | - Choo Khoon Ong
- Department of Medicine, RCSI-UCD Malaysia Campus, Georgetown, Penang, Malaysia
| | - Micheál Mac Aogáin
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | | | | | - Gerald Jiong Hui Sim
- Department of Respiratory and Critical Care Medicine, Changi General Hospital, Singapore
| | - Therese S Lapperre
- Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore; Department of Respiratory Medicine, Bispebjerg University Hospital, Copenhagen, Denmark
| | - Mariko Siyue Koh
- Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore
| | - David Shu Cheong Hui
- Department of Medicine and Therapeutics The Chinese University of Hong Kong, Hong Kong
| | | | - Augustine Tee
- Department of Respiratory and Critical Care Medicine, Changi General Hospital, Singapore
| | - Krasimira Tsaneva-Atanasova
- Living Systems Institute and Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK; PSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, UK
| | - Sanjay H Chotirmall
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.
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Castaldi PJ, Boueiz A, Yun J, Estepar RSJ, Ross JC, Washko G, Cho MH, Hersh CP, Kinney GL, Young KA, Regan EA, Lynch DA, Criner GJ, Dy JG, Rennard SI, Casaburi R, Make BJ, Crapo J, Silverman EK, Hokanson JE. Machine Learning Characterization of COPD Subtypes: Insights From the COPDGene Study. Chest 2019; 157:1147-1157. [PMID: 31887283 DOI: 10.1016/j.chest.2019.11.039] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/18/2019] [Accepted: 11/29/2019] [Indexed: 12/17/2022] Open
Abstract
COPD is a heterogeneous syndrome. Many COPD subtypes have been proposed, but there is not yet consensus on how many COPD subtypes there are and how they should be defined. The COPD Genetic Epidemiology Study (COPDGene), which has generated 10-year longitudinal chest imaging, spirometry, and molecular data, is a rich resource for relating COPD phenotypes to underlying genetic and molecular mechanisms. In this article, we place COPDGene clustering studies in context with other highly cited COPD clustering studies, and summarize the main COPD subtype findings from COPDGene. First, most manifestations of COPD occur along a continuum, which explains why continuous aspects of COPD or disease axes may be more accurate and reproducible than subtypes identified through clustering methods. Second, continuous COPD-related measures can be used to create subgroups through the use of predictive models to define cut-points, and we review COPDGene research on blood eosinophil count thresholds as a specific example. Third, COPD phenotypes identified or prioritized through machine learning methods have led to novel biological discoveries, including novel emphysema genetic risk variants and systemic inflammatory subtypes of COPD. Fourth, trajectory-based COPD subtyping captures differences in the longitudinal evolution of COPD, addressing a major limitation of clustering analyses that are confounded by disease severity. Ongoing longitudinal characterization of subjects in COPDGene will provide useful insights about the relationship between lung imaging parameters, molecular markers, and COPD progression that will enable the identification of subtypes based on underlying disease processes and distinct patterns of disease progression, with the potential to improve the clinical relevance and reproducibility of COPD subtypes.
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Affiliation(s)
- Peter J Castaldi
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; General Medicine and Primary Care, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
| | - Adel Boueiz
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Jeong Yun
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Raul San Jose Estepar
- Applied Chest Imaging Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - James C Ross
- Applied Chest Imaging Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - George Washko
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Applied Chest Imaging Laboratory, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Michael H Cho
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Craig P Hersh
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Gregory L Kinney
- Department of Epidemiology, University of Colorado, Denver, Aurora, CO
| | - Kendra A Young
- Department of Epidemiology, University of Colorado, Denver, Aurora, CO
| | | | - David A Lynch
- Department of Radiology, National Jewish Health, Denver, CO
| | - Gerald J Criner
- Department of Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA
| | - Jennifer G Dy
- Department of Electrical and Computer Engineering, Northeastern University, Boston, MA
| | - Stephen I Rennard
- Pulmonary and Critical Care Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Richard Casaburi
- Rehabilitation Clinical Trials Center, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA
| | | | | | - Edwin K Silverman
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - John E Hokanson
- Department of Epidemiology, University of Colorado, Denver, Aurora, CO
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Sánchez-Rico M, Alvarado JM. A Machine Learning Approach for Studying the Comorbidities of Complex Diagnoses. Behav Sci (Basel) 2019; 9:E122. [PMID: 31766665 PMCID: PMC6960661 DOI: 10.3390/bs9120122] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/16/2019] [Accepted: 11/20/2019] [Indexed: 02/08/2023] Open
Abstract
The study of diagnostic associations entails a large number of methodological problems regarding the application of machine learning algorithms, collinearity and wide variability being some of the most prominent ones. To overcome these, we propose and tested the usage of uniform manifold approximation and projection (UMAP), a very recent, popular dimensionality reduction technique. We showed its effectiveness by using it on a large Spanish clinical database of patients diagnosed with depression, to whom we applied UMAP before grouping them using a hierarchical agglomerative cluster analysis. By extensively studying its behavior and results, validating them with purely unsupervised metrics, we show that they are consistent with well-known relationships, which validates the applicability of UMAP to advance the study of comorbidities.
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Affiliation(s)
- Marina Sánchez-Rico
- Department of Psychobiology & Behavioral Sciences Methods, Faculty of Psychology, Universidad Complutense de Madrid, Campus de Somosaguas S/N, 28223 Pozuelo de Alarcon, Spain;
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Antonelli Incalzi R, Canonica GW, Scichilone N, Rizzoli S, Simoni L, Blasi F. The COPD multi-dimensional phenotype: A new classification from the STORICO Italian observational study. PLoS One 2019; 14:e0221889. [PMID: 31518364 PMCID: PMC6743765 DOI: 10.1371/journal.pone.0221889] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 08/17/2019] [Indexed: 12/03/2022] Open
Abstract
Background This paper is aimed to (i) develop an innovative classification of COPD, multi-dimensional phenotype, based on a multidimensional assessment; (ii) describe the identified multi-dimensional phenotypes. Methods An exploratory factor analysis to identify the main classificatory variables and, then, a cluster analysis based on these variables were run to classify the COPD-diagnosed 514 patients enrolled in the STORICO (trial registration number: NCT03105999) study into multi-dimensional phenotypes. Results The circadian rhythm of symptoms and health-related quality of life, but neither comorbidity nor respiratory function, qualified as primary classificatory variables. Five multidimensional phenotypes were identified: the MILD COPD characterized by no night-time symptoms and the best health status in terms of quality of life, quality of sleep, level of depression and anxiety, the MILD EMPHYSEMATOUS with prevalent dyspnea in the early-morning and day-time, the SEVERE BRONCHITIC with nocturnal and diurnal cough and phlegm, the SEVERE EMPHYSEMATOUS with nocturnal and diurnal dyspnea and the SEVERE MIXED COPD distinguished by higher frequency of symptoms during 24h and worst quality of life, of sleep and highest levels of depression and anxiety. Conclusions Our results showed that properly collected respiratory symptoms play a primary classificatory role of COPD patients. The longitudinal observation will disclose the discriminative and prognostic potential of the proposed multidimensional phenotype. Trial registration Trial registration number: NCT03105999, date of registration: 10th April 2017.
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Affiliation(s)
| | - Giorgio Walter Canonica
- Personalized Medicine Asthma & Allergy Clinic Humanitas University Humanitas research Hospital, Rozzano, Milan, Italy
| | - Nicola Scichilone
- DIBIMIS, University of Palermo, Piazza delle Cliniche, Palermo, Italy
| | | | | | - Francesco Blasi
- Department of Pathophysiology and Transplantation, University of Milan, Internal Medicine Department, Respiratory Unit and Cystic Fibrosis Adult Center Fondazione IRCCS Cà Granda Maggiore Hospital, Milan, Italy
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Mazzotti DR, Keenan BT, Lim DC, Gottlieb DJ, Kim J, Pack AI. Symptom Subtypes of Obstructive Sleep Apnea Predict Incidence of Cardiovascular Outcomes. Am J Respir Crit Care Med 2019; 200:493-506. [PMID: 30764637 PMCID: PMC6701040 DOI: 10.1164/rccm.201808-1509oc] [Citation(s) in RCA: 256] [Impact Index Per Article: 51.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 02/06/2019] [Indexed: 01/04/2023] Open
Abstract
Rationale: Symptom subtypes have been described in clinical and population samples of patients with obstructive sleep apnea (OSA). It is unclear whether these subtypes have different cardiovascular consequences.Objectives: To characterize OSA symptom subtypes and assess their association with prevalent and incident cardiovascular disease in the Sleep Heart Health Study.Methods: Data from 1,207 patients with OSA (apnea-hypopnea index ≥ 15 events/h) were used to evaluate the existence of symptom subtypes using latent class analysis. Associations between subtypes and prevalence of overall cardiovascular disease and its components (coronary heart disease, heart failure, and stroke) were assessed using logistic regression. Kaplan-Meier survival analysis and Cox proportional hazards models were used to evaluate whether subtypes were associated with incident events, including cardiovascular mortality.Measurements and Main Results: Four symptom subtypes were identified (disturbed sleep [12.2%], minimally symptomatic [32.6%], excessively sleepy [16.7%], and moderately sleepy [38.5%]), similar to prior studies. In adjusted models, although no significant associations with prevalent cardiovascular disease were found, the excessively sleepy subtype was associated with more than threefold increased risk of prevalent heart failure compared with each of the other subtypes. Symptom subtype was also associated with incident cardiovascular disease (P < 0.001), coronary heart disease (P = 0.015), and heart failure (P = 0.018), with the excessively sleepy again demonstrating increased risk (hazard ratios, 1.7-2.4) compared with other subtypes. When compared with individuals without OSA (apnea-hypopnea index < 5), significantly increased risk for prevalent and incident cardiovascular events was observed mostly for patients in the excessively sleepy subtype.Conclusions: OSA symptom subtypes are reproducible and associated with cardiovascular risk, providing important evidence of their clinical relevance.
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Affiliation(s)
- Diego R. Mazzotti
- Division of Sleep Medicine, Department of Medicine and
- Center for Sleep and Circadian Neurobiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Brendan T. Keenan
- Center for Sleep and Circadian Neurobiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Diane C. Lim
- Division of Sleep Medicine, Department of Medicine and
- Center for Sleep and Circadian Neurobiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - Daniel J. Gottlieb
- VA Boston Healthcare System, Boston, Massachusetts
- Department of Medicine, Brigham and Women’s Hospital, Boston, Massachusetts
- Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts; and
| | - Jinyoung Kim
- Center for Sleep and Circadian Neurobiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
- University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania
| | - Allan I. Pack
- Division of Sleep Medicine, Department of Medicine and
- Center for Sleep and Circadian Neurobiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
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Ladjemi MZ, Burgel PR, Pilette C. Reply to Polverino: Deconvoluting Chronic Obstructive Pulmonary Disease: Are B Cells the Frontrunners? Am J Respir Crit Care Med 2019; 199:1171-1172. [PMID: 30633554 PMCID: PMC6515872 DOI: 10.1164/rccm.201812-2249le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Maha Zohra Ladjemi
- 1 Université Catholique de Louvain Brussels, Belgium.,2 Walloon Excellence in Life Sciences and Biotechnology Brussels, Belgium
| | - Pierre Régis Burgel
- 3 Université Paris Descartes Paris, France.,4 Hôpital Cochin, AP-HP Paris, France and
| | - Charles Pilette
- 1 Université Catholique de Louvain Brussels, Belgium.,2 Walloon Excellence in Life Sciences and Biotechnology Brussels, Belgium.,5 Cliniques Universitaires Saint-Luc Brussels, Belgium
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Eap D, Ghasarossian C, Malmartel A. [The GLORI-COPD score: detection of COPD patients at risk of complications]. Rev Mal Respir 2019; 36:468-476. [PMID: 31010752 DOI: 10.1016/j.rmr.2019.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 02/04/2019] [Indexed: 10/27/2022]
Abstract
DEVELOPMENT OF THE GLORI-COPD SCORE GLObal RIsk of severe outcomes in COPD patients. INTRODUCTION Chronic obstructive pulmonary disease (COPD) is a commonly under-diagnosed disease. This study aimed to develop a screening tool for COPD patients with a high risk of complications, taking into account COPD severity and associated co-morbidity. METHODS Two Delphi rounds were conducted to select the items for a preliminary score. Subsequently, this score was submitted to patients with a possible diagnosis of COPD attending for pulmonary function tests in hospital and primary care. Items associated with a diagnosis of COPD and its severity were examined with multivariate logistic regressions. Associated items in our analyses and in the literature were integrated into the score. The score was developed with a factorial analysis and optimized according to ROC curves. RESULTS Fifteen items were selected with the Delphi method, of which six were retained after logistic regression. They were submitted to 64 patients (mean age: 59+/-13.6 years). Factors associated with COPD were smoking ≥10 pack-years and a history of acute exacerbations. Low levels of activity and coughing up sputum were associated with COPD severity. Age ≥40 years and co-morbidities were added to the score. According to the factorial analysis, a two-stage score was developed assessing first the diagnosis of COPD and then the risk of severe outcomes. It showed a sensitivity of 71 %, a specificity of 77 %. The positive and negative predictive value were respectively 28 % and 96 %. CONCLUSION The score was an acceptable screening tool to identify COPD patients with high risk of complications. Nevertheless, validation needs be performed in a larger population to allow its use in primary care.
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Affiliation(s)
- D Eap
- Département de médecine générale, université de médecine Paris Descartes - Site Cochin, 24, rue du Faubourg Saint-Jacques, 75014 Paris, France
| | - C Ghasarossian
- Département de médecine générale, université de médecine Paris Descartes - Site Cochin, 24, rue du Faubourg Saint-Jacques, 75014 Paris, France
| | - A Malmartel
- Département de médecine générale, université de médecine Paris Descartes - Site Cochin, 24, rue du Faubourg Saint-Jacques, 75014 Paris, France.
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Pikoula M, Quint JK, Nissen F, Hemingway H, Smeeth L, Denaxas S. Identifying clinically important COPD sub-types using data-driven approaches in primary care population based electronic health records. BMC Med Inform Decis Mak 2019; 19:86. [PMID: 30999919 PMCID: PMC6472089 DOI: 10.1186/s12911-019-0805-0] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/27/2019] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND COPD is a highly heterogeneous disease composed of different phenotypes with different aetiological and prognostic profiles and current classification systems do not fully capture this heterogeneity. In this study we sought to discover, describe and validate COPD subtypes using cluster analysis on data derived from electronic health records. METHODS We applied two unsupervised learning algorithms (k-means and hierarchical clustering) in 30,961 current and former smokers diagnosed with COPD, using linked national structured electronic health records in England available through the CALIBER resource. We used 15 clinical features, including risk factors and comorbidities and performed dimensionality reduction using multiple correspondence analysis. We compared the association between cluster membership and COPD exacerbations and respiratory and cardiovascular death with 10,736 deaths recorded over 146,466 person-years of follow-up. We also implemented and tested a process to assign unseen patients into clusters using a decision tree classifier. RESULTS We identified and characterized five COPD patient clusters with distinct patient characteristics with respect to demographics, comorbidities, risk of death and exacerbations. The four subgroups were associated with 1) anxiety/depression; 2) severe airflow obstruction and frailty; 3) cardiovascular disease and diabetes and 4) obesity/atopy. A fifth cluster was associated with low prevalence of most comorbid conditions. CONCLUSIONS COPD patients can be sub-classified into groups with differing risk factors, comorbidities, and prognosis, based on data included in their primary care records. The identified clusters confirm findings of previous clustering studies and draw attention to anxiety and depression as important drivers of the disease in young, female patients.
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Affiliation(s)
- Maria Pikoula
- Institute of Health Informatics, University College London, 222 Euston Road, London, NW1 2DA, UK.
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK.
| | - Jennifer Kathleen Quint
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK
- Respiratory Epidemiology, Occupational Medicine and Public Health, National Heart and Lung Institute, Imperial College London, London, UK
- EHR Research Group, School of Hygiene and Tropical Medicine, London, UK
| | - Francis Nissen
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK
- EHR Research Group, School of Hygiene and Tropical Medicine, London, UK
| | - Harry Hemingway
- Institute of Health Informatics, University College London, 222 Euston Road, London, NW1 2DA, UK
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK
| | - Liam Smeeth
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK
- EHR Research Group, School of Hygiene and Tropical Medicine, London, UK
| | - Spiros Denaxas
- Institute of Health Informatics, University College London, 222 Euston Road, London, NW1 2DA, UK
- Health Data Research UK London, University College London, 222 Euston Road, London, NW1 2DA, UK
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Petersen H, Vazquez Guillamet R, Meek P, Sood A, Tesfaigzi Y. Early Endotyping: A Chance for Intervention in Chronic Obstructive Pulmonary Disease. Am J Respir Cell Mol Biol 2019. [PMID: 29522352 DOI: 10.1165/rcmb.2018-0002ps] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a syndrome that comprises several lung pathologies, but subphenotyping the various disease subtypes has been difficult. One reason may be that current efforts focused on studying COPD once it has occurred do not allow tracing back to the different origins of disease. This perspective proposes that emphysema originates when susceptible airway, endothelial, and/or hematopoietic cells are exposed to environmental toxins such as cigarette smoke, biomass fuel, or traffic emissions. These susceptible cell types may initiate distinct pathobiological mechanisms ("COPD endotypes") that ultimately manifest the emphysematous destruction of the lung. On the basis of evidence from the "airway" endotype, we suggest that grading these endotypes by severity may allow better diagnosis of disease at early stages when intervention can be designed on the basis of the mechanisms involved. Therefore, genomic, proteomic, and metabolomic studies on at-risk patients will be important in the identification of biomarkers that help designate each endotype. Together with understanding of the involved molecular pathways that lead to disease manifestation, these efforts may lead to development of intervention strategies.
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Affiliation(s)
- Hans Petersen
- 1 COPD Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico
| | - Rodrigo Vazquez Guillamet
- 2 Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, New Mexico; and
| | - Paula Meek
- 3 Adult and Gerontological Health Division, University of Colorado College of Nursing, Colorado
| | - Akshay Sood
- 2 Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, New Mexico; and
| | - Yohannes Tesfaigzi
- 1 COPD Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico
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Burgel PR, Lemonnier L, Dehillotte C, Sykes J, Stanojevic S, Stephenson AL, Paillasseur JL. Cluster and CART analyses identify large subgroups of adults with cystic fibrosis at low risk of 10-year death. Eur Respir J 2019; 53:13993003.01943-2018. [PMID: 30578399 DOI: 10.1183/13993003.01943-2018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Accepted: 12/14/2018] [Indexed: 12/12/2022]
Abstract
Our goal was to identify subgroups of adults with cystic fibrosis (CF) at low risk of death within 10 years.Factor analysis for mixed data followed by Ward's cluster analysis was conducted using 25 variables from 1572 French CF adults in 2005. Rates of death by subgroups were analysed over 10 years. An algorithm was developed using CART (classification and regression tree) analysis to provide rules for the identification of subgroups of CF adults with low rates of death within 10 years. This algorithm was validated in 1376 Canadian CF adults.Seven subgroups were identified by cluster analysis in French CF adults, including two subgroups with low (∼5%) rates of death at 10 years: one subgroup (22% of patients) was composed of patients with nonclassic CF, the other subgroup (17% of patients) was composed of patients with classic CF but low rates of Pseudomonas aeruginosa infection and diabetes. An algorithm based on CART analysis of data in 2005 allowed us to identify most French adults with low rates of death. When tested using data from Canadian CF adults in 2005, the algorithm identified 287 out of 1376 (21%) patients at low risk (10-year death: 7.7%).Large subgroups of CF adults share low risk of 10-year mortality.
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Affiliation(s)
| | | | | | - Jenna Sykes
- Adult CF Program, Dept of Medicine, University of Toronto, St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Sanja Stanojevic
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada.,The Hospital for Sick Children, Division of Respiratory Medicine, Toronto, ON, Canada
| | - Anne L Stephenson
- Adult CF Program, Dept of Medicine, University of Toronto, St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre, Toronto, ON, Canada.,Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
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43
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Abstract
INTRODUCTION Asthma is a common chronic airway inflammatory disease characterized by diverse inflammatory events leading to airway hyperresponsiveness and reversible airflow obstruction. Corticosteroids have been the mainstay for asthma treatment due to their broad anti-inflammatory actions; however, other medications such as phosphodiesterase 4 inhibitors also demonstrate anti-inflammatory activity in the airways. AREAS COVERED This review describes tissue expression of phosphodiesterase 4 in the airways, the different phosphodiesterase 4 isoenzymes identified, and the anti-inflammatory activities of phosphodiesterase 4 inhibition in asthma and related findings in chronic obstructive pulmonary disease (COPD). The authors further review clinical trials demonstrating that drugs such as roflumilast have an excellent safety profile and efficacy in patients with asthma and COPD. EXPERT OPINION Phosphodiesterase 4 inhibitors suppress the activity of immune cells, an effect similar to corticosteroids although by acting through different anti-inflammatory pathways and uniquely blocking neutrophilic inflammation. Roflumilast and other phosphodiesterase 4 inhibitors have been shown to provide additive protection in asthma when added to corticosteroid and anti-leukotriene treatment. Developmental drugs with dual phosphodiesterase 3 and 4 inhibition are thought to be able to provide bronchodilation and anti-inflammatory activities and will consequently be pushed forward in their clinical development for the treatment of asthma and COPD.
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Affiliation(s)
- Dhuha Al-Sajee
- a Department of Medicine , McMaster University , Hamilton , ON , Canada
| | - Xuanzhi Yin
- a Department of Medicine , McMaster University , Hamilton , ON , Canada
| | - Gail M Gauvreau
- a Department of Medicine , McMaster University , Hamilton , ON , Canada
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44
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Abstract
The concept of personalised medicine is recent but the underlying notions are not new: knowing how to adapt care to patients' characteristics is one of the components of the "art of medicine". The advances of science allow to refine considerably the applications of the concept in many fields of medicine including COPD: research has identified phenotypes, endotypes and treatable traits. Personalisation can be applied to all components of care. For instance, the decision to perform screening spirometry relies not only on risk factors (age, smoking, other exposures) but also on symptoms. Assessment of comorbidities often associated with COPD is based on risk factors and their combinations, variable between individuals. Rehabilitation and its components are in essence highly individualised, which a major condition for their success. Last but not least, personalisation of pharmacological therapy, which has long been rather poor, could not benefit from biomarkers of interest (predictive of response), such as blood eosinophil count. Practical strategies using these still need to be established, and new biomarkers may usefully enrich the collection!
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Affiliation(s)
- N Roche
- EA2511, service de pneumologie, université Paris Descartes, hôpital Cochin, hôpitaux universitaires Paris Centre, AP-HP 5, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France.
| | - C Martin
- EA2511, service de pneumologie, université Paris Descartes, hôpital Cochin, hôpitaux universitaires Paris Centre, AP-HP 5, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
| | - P-R Burgel
- EA2511, service de pneumologie, université Paris Descartes, hôpital Cochin, hôpitaux universitaires Paris Centre, AP-HP 5, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France
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45
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Soriano JB, Burgel PR. On Don Quixote and pink puffers: multi-organ loss of tissue COPD. Eur Respir J 2018; 51:51/2/1702560. [DOI: 10.1183/13993003.02560-2017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 12/11/2017] [Indexed: 11/05/2022]
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46
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Affiliation(s)
- Rosa Faner
- Centro Investigación Biomédica En Red Enfermedades Respiratorias (CIBERES), Spain .,Fundació Clínic per a la Recerca Biomèdica, Institut d'investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Alvar Agustí
- Centro Investigación Biomédica En Red Enfermedades Respiratorias (CIBERES), Spain.,Fundació Clínic per a la Recerca Biomèdica, Institut d'investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Pulmonary Service, Respiratory Institute, Hospital Clinic, University of Barcelona, Barcelona, Spain
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