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Cho SK, Chang Y, Kim I, Ryu S. U-Shaped Association Between Serum Uric Acid Level and Risk of Mortality: A Cohort Study. Arthritis Rheumatol 2018; 70:1122-1132. [PMID: 29694719 DOI: 10.1002/art.40472] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 02/22/2018] [Indexed: 12/13/2022]
Abstract
OBJECTIVE In addition to the controversy regarding the association of hyperuricemia with cardiovascular disease (CVD) mortality, few studies have examined the impact of a low uric acid level on mortality. We undertook the present study to evaluate the relationship between both low and high uric acid levels and the risk of all-cause and cause-specific mortality in a large sample of Korean adults over a full range of uric acid levels. METHODS A cohort study was performed in 375,163 South Korean men and women who underwent health check-ups from 2002 to 2012. Vital status and cause of death were ascertained from the national death records. Hazard ratios (HRs) and 95% confidence intervals (95% CIs) for mortality outcomes were estimated using Cox proportional hazards regression analysis. RESULTS During a total of 2,060,721.9 person-years of follow-up, 2,020 participants died, with 287 CVD deaths and 963 cancer deaths. Low and high uric acid levels were associated with increased all-cause, CVD, and cancer mortality. The multivariable-adjusted HRs for all-cause mortality in the lowest uric acid categories (<3.5 mg/dl for men and <2.5 mg/dl for women) compared with the sex-specific reference category were 1.58 (95% CI 1.18-2.10) and 1.80 (95% CI 1.10-2.93), respectively. Corresponding HRs in the highest uric acid categories (≥9.5 mg/dl for men and ≥8.5 mg/dl for women) were 2.39 (95% CI 1.57-3.66) and 3.77 (95% CI 1.17-12.17), respectively. CONCLUSION In this large cohort study of men and women, both low and high uric acid levels were predictive of increased mortality, supporting a U-shaped association between serum uric acid levels and adverse health outcomes.
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Affiliation(s)
| | - Yoosoo Chang
- Sungkyunkwan University School of Medicine and Kangbuk Samsung Hospital, Seoul, Republic of Korea
| | - Inah Kim
- Hanyang University, Seoul, Republic of Korea
| | - Seungho Ryu
- Sungkyunkwan University School of Medicine and Kangbuk Samsung Hospital, Seoul, Republic of Korea
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Buckle G, Maranda L, Skiles J, Ong'echa JM, Foley J, Epstein M, Vik TA, Schroeder A, Lemberger J, Rosmarin A, Remick SC, Bailey JA, Vulule J, Otieno JA, Moormann AM. Factors influencing survival among Kenyan children diagnosed with endemic Burkitt lymphoma between 2003 and 2011: A historical cohort study. Int J Cancer 2016; 139:1231-40. [PMID: 27136063 PMCID: PMC5489240 DOI: 10.1002/ijc.30170] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 04/19/2016] [Indexed: 12/23/2022]
Abstract
Discovering how to improve survival and establishing clinical reference points for children diagnosed with endemic Burkitt lymphoma (eBL) in resource-constrained settings has recaptured international attention. Using multivariate analyses, we evaluated 428 children with eBL in Kenya for age, gender, tumor stage, nutritional status, hemoglobin, lactate dehydrogenase (LDH), Epstein-Barr virus (EBV) and Plasmodium falciparum prior to induction of chemotherapy (cyclophosphamide, vincristine, methotrexate and doxorubicin) to identify predictive and prognostic biomarkers of survival. During this 10 year prospective study period, 22% died in-hospital and 78% completed six-courses of chemotherapy. Of those, 16% relapsed or died later; 31% achieved event-free-survival; and 31% were lost to follow-up; the overall one-year survival was 45%. After adjusting for covariates, low hemoglobin (<8 g/dL) and high LDH (>400 mU/ml) were associated with increased risk of death (adjusted Hazard Ratio (aHR) = 1.57 [0.97-2.41]) and aHR = 1.84, [0.91-3.69], respectively). Anemic children with malaria were 3.55 times more likely to die [1.10-11.44] compared to patients without anemia or malarial infection. EBV load did not differ by tumor stage nor was it associated with survival. System-level factors can also contribute to poor outcomes. Children were more likely to die when inadvertently overdosed by more than 115% of the correct dose of cyclophosphamide (a HR = 1.43 [0.84-2.43]) or doxorubicin (a HR = 1.25, [0.66-2.35]), compared with those receiving accurate doses of the respective agent in this setting. This study codifies risk factors associated with poor outcomes for eBL patients in Africa and provides a benchmark by which to assess improvements in survival for new chemotherapeutic approaches.
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Affiliation(s)
- Geoffrey Buckle
- Molecular Medicine, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655
| | - Louise Maranda
- Quantitative Health Sciences, University of Massachusetts Medical School, 55 Lake Avenue North, ASC6.1063, Worcester, MA 01655
| | - Jodi Skiles
- Pediatrics, Hemotology/Oncology, Indiana University School of Medicine, Full address: 705 Riley Hospital Drive, RI 2629, Indianapolis, IN 46202
| | - John Michael Ong'echa
- Center for Global, Health Research Kenya Medical Research Institute, P. O. Box 1578-40100, Kisumu, Kenya
| | - Joslyn Foley
- Molecular Medicine, University of Massachusetts Medical School, 373 Plantation St. Biotech 2, Suite 318, Worcester, MA 01605
| | - Mara Epstein
- Quantitative Health Sciences, University of Massachusetts Medical School, 365 Plantation St. Biotech 1, Suite 100, Worcester, MA 01605
| | - Terry A. Vik
- Pediatrics, Hemotology/Oncology, Indiana University School of Medicine, Full address: 705 Riley Hospital Drive, ROC 4340, Indianapolis, IN 46202
| | | | | | - Alan Rosmarin
- Medicine, Hematology/Oncology, University of Massachusetts Medical School, 55 Lake Avenue North, H8-533, Worcester, MA 01655
| | - Scot C. Remick
- Physician Leader, Oncology and Senior Scientist, Maine Medical Center and Maine Medical Center Research Institute, Portland, ME 04074
| | - Jeffrey A. Bailey
- Medicine, Bioinformatics, University of Massachusetts Medical School, 55 Lake Avenue North, ASC4.1077, Worcester, MA 01655
| | - John Vulule
- Center for Global Health Research, Kenya Medical Research Institute, P. O. Box 1578-40100, Kisumu, Kenya
| | - Juliana A. Otieno
- Jaramogi Oginga Odinga Teaching and Referral Hospital, Kenya Ministry of Health, P.O. Box 849-40100, Kisumu, Kenya
| | - Ann M. Moormann
- Molecular Medicine, University of Massachusetts Medical School, 373 Plantation Street, Biotech 2, Suite 318, Worcester MA, 01605 USA
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Ngoma T, Adde M, Durosinmi M, Githang'a J, Aken'Ova Y, Kaijage J, Adeodou O, Rajab J, Brown BJ, Leoncini L, Naresh K, Raphael M, Hurwitz N, Scanlan P, Rohatiner A, Venzon D, Magrath I. Treatment of Burkitt lymphoma in equatorial Africa using a simple three-drug combination followed by a salvage regimen for patients with persistent or recurrent disease. Br J Haematol 2012; 158:749-62. [PMID: 22844968 DOI: 10.1111/j.1365-2141.2012.09236.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 06/15/2012] [Indexed: 11/30/2022]
Abstract
Prior to the introduction of the International Network for Cancer Treatment and Research (INCTR) protocol INCTR 03-06, survival of patients with Burkitt lymphoma at four tertiary care centres in equatorial Africa was probably no more than 10-20%. The results reported here for 356 patients have demonstrated marked improvement in survival through the use of a uniform treatment protocol consisting of cyclophosphamide, methotrexate, vincristine, and intrathecal therapy, and the introduction of non-cross resistant second-line (salvage) therapy, consisting of ifosfamide, mesna, etoposide and cytarabine, when patients failed to achieve a complete response to first-line therapy or relapsed early. Overall survival rates of 67% and 62% were observed at 1 and 2 years (relapse is rare after 1 year of remission). Of interest was the small impact of cerebrospinal fluid (CSF) and bone marrow involvement on outcome. However, the presence or absence of abdominal involvement clearly defined two prognostic groups. An additional finding was the association between CSF pleocytosis and orbital tumours, suggesting that spread of tumour cells to the central nervous system may sometimes occur via direct involvement of cranial nerves in the orbit. Survival rates may be increased in patients with abdominal involvement by combining first- and second-line therapy, but verification will require a further clinical study.
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Affiliation(s)
- Twalib Ngoma
- Ocean Road Cancer Institute, Dar es Salaam, Tanzania
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