Summary
Previous studies have shown an association between serum C-reactive protein (CRP)
and cardiovascular disease (CVD) risk. The roles of interleukin-6 (IL-6) and tumor
necrosis factor alpha (TNFα) are less well established. The aim of the present study
was to analyze the associations of CRP, IL-6 and TNFα with incident coronary heart
disease (CHD) events, CVD events, and total mortality. A random population sample,
including men and women aged 25–64 years was examined in Finland in 1992.The sample
size was 7,927 and 6,051 (76%) participated. The cohort was followed up until the
end of 2001. During the follow-up, 151 incident CHD events, 205 CVD events and 183
deaths from any cause were observed. A stratified random subsample (n=313) was used
as the comparison group. After adjustment for conventional CVD risk factors, CRP showeda
significant association with CHD risk in men (HR=2.39, 1.08–5.28, comparing fourth
quartile to the first quartile).This association remained significant after further
adjustment for TNFα. TNFα also was a significant predictor of CHD among men, but the
association was nonlinear (HR=2.21, 1.18–4.14 comparing the three upper quartiles
to the first quartile). Further adjustment for CRP did not change this association
substantially. Both CRP and TNFα predicted also all CVD events and total mortality
among men. Among women the findings were nonsignificant. In conclusion, CRP andTNFα
were significant, independent predictors of CHD and CVD events and total mortality
among men. These findings provide further support to the important role of inflammation
in the pathogenesis of CVD.
Keywords
Cardiovascular disease - cytokines - inflammation - myocardial infarction