Factors associated with physical inactivity among the pre-school children: A cohort of 1681 participants.

AIM: To investigate the risk factors associated with physical inactivity of young children in Hong Kong. METHODS: This follow-up study was part of a prospective cohort study named Studying Impact of Nutrition on Growth (SING) initiated in 2015. Subjects were recruited from randomly selected local nurseries and kindergartens in Hong Kong. Self-administrated questionnaires were distributed to parents in 2016-2017 to collect information on: (i) socio-economic background; (ii) health-related factors, including gestation at time of birth, and hospitalisation of the child since birth; (iii) types of leisure activities, including time spent on electronic games and physical activity. RESULTS: A total of 1681 responses were collected. A higher likelihood of physical inactivity on weekdays was associated with being female, not being the firstborn, having been hospitalised three or more times since birth, and having physically inactive care givers. Meanwhile, children whose mother was unemployed/retired, and who spent more than 1 h on electronic games per day were significantly less likely to be physically inactive. Similarly, being female, being the secondborn or the thirdborn, and having a care giver with low physical activity level were associated with a higher chance of physical inactivity on weekends. CONCLUSIONS: Parental support could play a pivotal role in determining a child's physical activity level. Public health policies should be implemented to promote family-based physical activities.