Abstract
Associations between elevated C-reactive protein (CRP) levels and the angina pectoris risk have been reported for many years, but the results remain controversial. To address this issue, a meta-analysis was therefore conducted. Eligible studies were identified by searching PubMed, EMBASE, Cochrane library, and web of science up to January 2019. Altogether, 10 prospective cohort studies and 11 case-control studies were included, and they were published from 1997 to 2013 and summed up to 18,316 samples totally. The pooled mean difference of CRP levels was 4.44 (95% confidence interval 2.71 to 6.17) between angina patients and healthy controls. The combined odds ratio of CRP for major adverse cardiac events in angina patients was 1.67 (95% CI 1.23 to 2.26). In conclusion, the meta-analysis indicated that elevated CRP levels were associated with angina pectoris, especially unstable angina pectoris, and were probably a risk factor of major adverse cardiac events.
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