Smoking increases CHD risk among Black adults
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Among Black adults, smoking was associated with elevated risk for CHD, according to research published in the Journal of the American Heart Association.

Although Black adults are more likely to die from coronary heart disease (CHD) compared with White adults, few studies have examined the relationship between cigarette smoking and CHD risk among Black adults. Researchers evaluated the relationship between cigarette smoking, incident CHD, and coronary artery calcification in the JHS (Jackson Heart Study).

Researchers classified JHS participants without a history of CHD (n=4432) by self-reported baseline smoking status into current, former (smoked at least 400 cigarettes/life) or never smokers at baseline. They further classified current smokers by smoking intensity (number of cigarettes smoked per day [1–19 or more than 20]) and followed for incident CHD (through 2016). Hazard ratios (HR) for incident CHD for each smoking group compared with never smokers were estimated with adjusted Cox proportional hazard regression models.

At baseline, there were 548 (12.4%) current, 782 (17.6%) former, and 3102 (70%) never smokers. During follow-up (median, 13.8 years), 254 participants developed CHD. After risk factor adjustment, CHD risk was significantly higher in current smokers compared with never smokers; the difference between former smokers and never smokers did not achieve statistical significance. Among current smokers, we did not observe a dose-response effect for CHD risk. Additionally, in multivariable logistic regression models with a subset of our analytic cohort, current smokers had greater odds of coronary artery calcification score more than 0 compared with never smokers.

Conclusively, in a large prospective cohort of Black adults, current smoking was associated with a more than 2-fold increased risk of CHD over a median follow-up of greater than a decade.