Journal
JOURNAL OF THE AMERICAN HEART ASSOCIATION
Volume 6, Issue 10, Pages -Publisher
WILEY
DOI: 10.1161/JAHA.117.005610
Keywords
cardiovascular disease; cohort study; high sensitivity C-reactive protein; incidence; risk factor
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Background-One measurement of hs-CRP (high-sensitivity C-reactive protein) is associated with increased risk of cardiovascular disease (CVD). The objective of this study was to characterize the association of cumulative exposure to increased hs-CRP with incident cardiovascular events. Methods and Results-We included 53 065 participants with hs-CRP measured at 3 examinations in 2006, 2008, and 2010. Cumulative exposure to hs-CRP was calculated as the weighted sum of the average hs-CRP level for each time interval (level9time). Participants were classified into nonexposed group (hs-CRP< 3.0 mg/L in all 3 examinations), 1-exposed group (hsCRP= 3.0 mg/L in 1 of the 3 examinations), 2-exposed group (hs-CRP= 3.0 mg/L in 2 of the 3 examinations), and 3-exposed group (hs-CRP= 3.0 mg/L in 3 examinations). Cox proportional hazards models were used to assess the association of cumulative hs-CRP with incident CVD. The study showed a dose-response pattern with risk of CVD and myocardial infarction as the number of years of exposure to hs-CRP increases. Participants in the 3-exposed group had significantly increased CVD risk with hazard ratio (95% confidence interval) of 1.38 (1.11-1.72), in comparison with 1.28 (1.07-1.52) for participants in the 2-exposed group and 1.13 (0.97-1.31) for those in the 1-exposed group (P< 0.05); meanwhile, the similar and significant associations were also observed for myocardial infarction with respective hazard ratio (95% confidence interval) of 2.13 (1.42-3.18), 1.60 (1.12-2.27), and 1.57 (1.172.10). The associations between stroke and cumulative hs-CRP were not statistically significant (P= 0.360). Conclusions-Cumulative exposure to hs-CRP was dose dependently associated with a subsequent increased risk of CVD and myocardial infarction.
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