BACKGROUND
Psychological problems among children and adolescents have become a public health issue.
OBJECTIVE
This study aimed to investigate associations between screen time (ST), outdoor activity (OA), and emotional and behavioural health problems (EBHPs) among South Chinese children and adolescents
METHODS
Purposive sampling has been adopted from April to May 2019 to conduct a questionnaire survey among 30,188 children and adolescents in grade 1 to 12 from 14 schools in 6 streets in Baoan District of Shenzhen according to the three stages of street - school type - school. EBHPs were measured with the strengths and difficulties questionnaire; OA and ST data were obtained through self-reporting. Descriptive analyses, chi-squared tests, and logistic regressions were performed using SPSS 23.0
RESULTS
In our study, 42.4% students had insufficient OA, 24.2% students had excessive ST, the abnormal of emotional symptoms, conduct problems, peer problems, hyperactivity problems, prosocial behaviour, and total difficulties scales were 18.5%, 6.9%, 6.4%, 13.1%, 10.7% and 8.8%. There were significant associations between ST/PA, independently and through interaction, and EBHPs among children and adolescents. Participants with high exposure to ST were more likely to have EBHPs than those with low exposure; participants with low exposure to PA were also more likely to have EBHPs than those with high exposure. The interactive associations of ST and PA on EBHPs were stronger than those of ST or PA individually.
CONCLUSIONS
Our results show positive associations between ST, OA, and EBHPs. They indicate that interventions should be considered for decreasing ST and increasing OA in children and adolescents.