This population-based cohort study showed that high-sensitivity C-reactive protein (hs-CRP) was independently associated with atrial fibrillation (AF) in men, but apparently not in women, and that patients with WBCs in the upper quartile had increased risk of AF.
Inflammatory biomarkers are reported as risk factors for atrial fibrillation (AF). The study investigated the associations between inflammatory biomarkers and future AF in a large general cohort involving 6315 men and women in an 11-yr follow-up study.
Available markers were white blood cells (WBCs) with subgroups, fibrinogen, high-sensitivity C-reactive protein (hs-CRP), and osteoprotegerin (OPG). A total of 6315 men and women from a population survey in Tromsø in Norway in 1994 to 1995 were followed for a mean of 10.9 years.
Mean age at baseline was 60 years. Measurements of height, weight, blood pressure, heart rate, total cholesterol, high-density lipoprotein (HDL) cholesterol, WBC count, and information on diabetes, angina, myocardial infarction, and antihypertensive treatment, were obtained at baseline.
Fibrinogen, hs-CRP, and OPG were obtained at a follow-up visit. The outcome measure was first-ever AF, documented on an electrocardiogram. The Cox proportional hazards regression model was used to estimate hazard ratios of AF.
In the multivariable analysis, adjusted for traditional cardiovascular risk factors and other inflammatory biomarkers, hs-CRP was associated with AF in men only (hazard ratio = 1.14 for a 1 SD increase; 95% CI, 1.02–1.28). There was a significant increase in AF across quartiles of WBCs in men (P = 0.007) and in the total study population (P = 0.004). OPG was associated with AF in patients free of coronary heart disease at baseline. Fibrinogen and subgroups of WBCs showed no significant association with AF.
Reference: The Tromsø Study, GENDER MEDICINE, 2012:Gender Medicine, Volume 9, Issue 6
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