Abstract
Objective: To reveal any association between rheumatoid arthritis (RA) and cardiovascular comorbidities using a Japanese health insurance database.Method: This population-based cross-sectional study was conducted using health insurance data provided by the Japan Medical Data Center Co., Ltd. We identified 2762 RA subjects having RA diagnostic codes (ICD10 codes; M05, M060, M062–63, M068–069) with at least two physician visits more than two months apart between June 2011 and May 2012 (RA group, n = 2762). We selected age- (±5 years), sex-, and study period-matched non-RA subjects (non-RA group, n = 27,620). We compared the prevalence of cardiovascular and related comorbidities (ischemic heart diseases [IHD], cerebral infarction, hypertension [HT], dyslipidemia [DL], and diabetes mellitus [DM]) between these groups and investigated the association between RA and cardiovascular comorbidities using a conditional logistic regression analysis.Results: The prevalence of all the investigated comorbidities in the RA group was significantly higher compared to the non-RA group. Odds ratios [95% confidence interval] of RA for IHD and cerebral infarction were 2.0 [1.5–2.5] and 3.1 [2.2–4.2] respectively, after adjusting for HT, DL, and DM.Conclusions: This study revealed for the first time in the Japanese population that RA was significantly associated with cardiovascular comorbidities.
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