Joint effect of depression and health behaviors or conditions on incident cardiovascular diseases: a Korean population-based cohort study

2020 
Abstract Background The precise relationships among depression, risk factors for cardiovascular disease (CVD), and incident CVD remain uncertain. This study examined the joint effect of depression and other CVD risk factors on the incidence of CVD. Methods We conducted a prospective cohort study using South Korea's National Health Insurance Service-National Sample Cohort (NHIS-NSC). To estimate incident CVD, 199,544 participants without CVD diagnosed with depression between 2003 and 2005 were followed through 2013. The clinician's diagnosis used measurements for depression, CVD risk factors, and CVD. Results Controlling for other CVD risk factors, depressed individuals had a higher risk for ischemic heart disease (AHR, 1.01; 99%CI, 1.01-1.50) and other forms of heart disease likely related to atherosclerosis (AHR, 1.43; 99%CI, 1.13-1.82). There were no statistically significant interactions between depression and CVD risk factors. However, when depression was comorbid with overweight or diabetes, there was a higher risk for incident ischemic heart disease, as compared to depression or CVD risk factors alone. For other forms of heart disease likely related to atherosclerosis, the coexistence of depression and physical inactivity or overweight showed a similar pattern to that shown in ischemic heart disease. Limitations The severity of depression was not reported for depressed patients, and our dataset provided a limited number of covariates. Also, the self-reported health behavior data may be biased. Conclusion As depression could be a significant predictor of incident CVD independently with other CVD risk factors, professionals should recognize and manage depression as a major CVD risk factor.
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