Effects of Sleep Habits on Acute Myocardial Infarction Risk and Severity of Coronary Artery Disease in Chinese Population

Growing evidence indicates that poor sleep harms health. Early to bed and early to rise is considered as a healthy lifestyle in Chinese population. The current study aimed to examine the effects of sleep habits on acute myocardial infarction (AMI) risk and severity of coronary artery disease (CAD) in Chinese population from two centers. A total of 873 patients including 314 with AMI were recruited from the inpatient cardiology department of the Affiliated Jiangning Hospital and the First Affiliated Hospital of Nanjing Medical University. 559 controls included 395 CAD cases and 164 non-CAD cases. Investigators used a 17-item sleep factors questionnaire (SFQ) to evaluate sleep habits comprehensively by face-to-face interview. The severity of CAD was assessed by Gensini score in AMI and CAD groups. The effects of sleep factors on AMI risk and Gensini score were examined by unconditional logistic regression. The timing of sleep (24:00 and after), sleep duration (<6h) and frequency of night-time waking (3 times) increased the risk of AMI. In subjects with age ≤60 years, daytime napping reduced the risk of AMI. The correlation between sleep quality and AMI became insignificant after subgroup analysis by age. Short sleep duration also increased the risk of high Gensini score.