Hsien-Feng Lin1,2, Kuan-Fu Liao3,4,5, Ching-Mei Chang6, Cheng-Li Lin7,8, Shih-Wei Lai2,7. 1. a School of Chinese Medicine , China Medical University , Taichung , Taiwan. 2. b Department of Family Medicine , China Medical University Hospital , Taichung , Taiwan. 3. c Department of Internal Medicine , Taichung Tzu Chi General Hospital , Taichung , Taiwan. 4. d College of Medicine , Tzu Chi University , Hualien , Taiwan. 5. e Graduate Institute of Integrated Medicine, China Medical University , Taichung , Taiwan. 6. f Department of Nursing , Tungs' Taichung Metro Habor Hospital , Taichung , Taiwan. 7. g College of Medicine , China Medical University , Taichung , Taiwan. 8. h Management Office for Health Data, China Medical University Hospital , Taichung , Taiwan.
Abstract
BACKGROUND/ OBJECTIVE: Potential association between prior statin use and chronic osteomyelitis is examined. METHODS: A nationwide case-control study was conducted based on data taken from the Taiwan National Health Insurance program. The case group includes 2338 subjects aged 20-84 years newly diagnosed for chronic osteomyelitis from 2000 to 2013; the control group included 2338 randomly selected subjects without chronic osteomyelitis matched for sex, age, and index year. Statin use was respectively defined as "current", "recent" or "past" if the most recent statin prescription was filled <3 months, 3-6 months or ≥6 months prior to the chronic osteomyelitis diagnosis. Relative risk of chronic osteomyelitis associated with statin use was measured by the odds ratio (OR) with 95% confidence interval (CI) using the conditional logistic regression model. RESULTS: After controlling for potential confounders, the adjusted ORs of chronic osteomyelitis were 0.57 for subjects with current statin use (95% CI 0.45, 0.72), 0.80 for subjects with recent statin use (95% CI 0.48, 1.33), and 1.00 for subjects with past statin use (95% CI 0.83, 1.20), compared patients with no prior statin use. In further analysis, the adjusted ORs of chronic osteomyelitis were 0.70 for subjects with cumulative statin use <12 months (95% CI 0.47, 1.07), and 0.56 for subjects with cumulative statins use ≥12 months (95% CI 0.41, 0.77), compared with those with no prior statin use. CONCLUSIONS: Current statin use is associated with reduced concurrent diagnosis of chronic osteomyelitis, particularly for a cumulative statin use ≥12 months.
BACKGROUND/ OBJECTIVE: Potential association between prior statin use and chronic osteomyelitis is examined. METHODS: A nationwide case-control study was conducted based on data taken from the Taiwan National Health Insurance program. The case group includes 2338 subjects aged 20-84 years newly diagnosed for chronic osteomyelitis from 2000 to 2013; the control group included 2338 randomly selected subjects without chronic osteomyelitis matched for sex, age, and index year. Statin use was respectively defined as "current", "recent" or "past" if the most recent statin prescription was filled <3 months, 3-6 months or ≥6 months prior to the chronic osteomyelitis diagnosis. Relative risk of chronic osteomyelitis associated with statin use was measured by the odds ratio (OR) with 95% confidence interval (CI) using the conditional logistic regression model. RESULTS: After controlling for potential confounders, the adjusted ORs of chronic osteomyelitis were 0.57 for subjects with current statin use (95% CI 0.45, 0.72), 0.80 for subjects with recent statin use (95% CI 0.48, 1.33), and 1.00 for subjects with past statin use (95% CI 0.83, 1.20), compared patients with no prior statin use. In further analysis, the adjusted ORs of chronic osteomyelitis were 0.70 for subjects with cumulative statin use <12 months (95% CI 0.47, 1.07), and 0.56 for subjects with cumulative statins use ≥12 months (95% CI 0.41, 0.77), compared with those with no prior statin use. CONCLUSIONS: Current statin use is associated with reduced concurrent diagnosis of chronic osteomyelitis, particularly for a cumulative statin use ≥12 months.
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Keywords:
Chronic osteomyelitis; Taiwan National Health Insurance Program; statins