Association of Leisure Sedentary Time with Common Chronic Disease Risk Factors: A Longitudinal Study of China Health and Nutrition Surveys.

BACKGROUND:Although the common risk factors were identified and controlled for many years, the overall prevalence of chronic diseases continued to increase in China.OBJECTIVE:We presumed the leisure sedentariness as a latent but pivotal factor of chronic diseases, and examined its distribution and changing trend, analysed its interaction effects on common risk factors, which could provide a new perspective for the prevention and management.METHODS:A total of 5013 participants were screened out from China Health and Nutrition Survey. Random-effects ordered logistic models were used for ordinal dependent variables, and fixed-effects or random-effects logit models were used for binary dependent variables.RESULTS:From 2004 to 2011, the prevalence of high leisure sedentary time (LSED) increased by 58.58%. Members of the high LSED group were likely to choose fast food, salty snacks, soft drinks and more likely to smoke or drink alcohol compared with those of the low LSED group. However, they preferred walking, sports and body building more than those of the low LSED group.CONCLUSIONS:For the unhealthy dietary, tobacco and alcohol consumption, more targeted introduction and guidance related to sedentary time should be promoted. Meanwhile, the appeal for physical exercise as well as adequate facilities should be initiated.