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Elevated Resting Heart Rate Is Associated With White Blood Cell Count in Middle-Aged and Elderly Individuals Without Apparent Cardiovascular Disease

We investigated the association between resting heart rate (HR) and inflammation markers in a healthy population. White blood cell (WBC) count was used as a surrogate marker of subclinical inflammation. Smoking status, body mass index, resting HR, high-density lipoprotein cholesterol, triglycerides, uric acid, and glycated hemoglobin were significantly associated with WBC in both men and women. Blood pressure and fasting plasma glucose levels, however, were associated with WBC only in women. Logistic regression analysis indicated that for every 10 beats per minute increase in HR, the odds ratio of an increase in the WBC was approximately 1.3 in both men and women. These findings indicate the clinical significance of resting HR for identifying individuals at risk of subclinical inflammation and a future cardiovascular event.