Healthy Lifestyle Matters: A Network Analysis of Urban Chinese Pre-School Children's Adiposity, Sleep Health, Mental Health, Child Functioning and Health Behaviours.

The cross-sectional design cannot show which variable came first or caused another. The sample came from three conveniently selected urban kindergartens in Zhuhai, so it may not represent rural children or other regions. Only typically developing children were included, so findings may not apply to children with neuromuscular disorders or intellectual disabilities. Parent-reported sleep, mental health, and diet answers may have recall bias and social desirability bias. Some sleep and mental health subscales had low internal consistency, so those scores may not measure one clear construct. The authors noted the sample size was modest for complex network analysis, and some network ranking measures were unstable, so only two centrality measures were interpreted.

The authors declared no conflicts of interest. Funding was from the Dean's Research Fund at the Faculty of Liberal Arts and Social Sciences, The Education University of Hong Kong.

Do not read the age, sex, sleep, diet, and activity links as proof that a therapy or lifestyle change will improve adiposity or mental health. The study was cross-sectional and did not test any intervention, so it cannot show cause and effect.