Objective: To systematically evaluate the prevalence and influencing factors of screen exposure among preschool children in China, so as to provide evidence for formulating scientific intervention strategies. Methods: Retrieve relevant studies on screen exposure among preschool children from PubMed, Web of Science, Embase, Cochrane Library, China Biomedical Literature Database, CNKI, VIP, and Wanfang databases from the time of estaldishment to June 29, 2025. Meta analysis was performed using Stata 16.0 software. Results: A total of 43 studies were included. Meta analysis showed that the prevalence of screen exposure among preschool children in China was 46.0% (95% CI = 38.9 %-53.1%, P <0.01). Girls, non only child, father s age<35 years, both parents having an educational level of high school or below, being cared for by grandparents, rural residence, parents having no exercise habit, parental support for the use of screen devices, and parental screen time>1 h/d were influencing factors for screen exposure among preschool children [ OR (95% CI ) were 0.85(0.78-0.92), 1.09(1.04-1.15), 1.45(1.22-1.71), 1.38(1.24- 1.54 ), 1.78(1.32-2.40), 1.39(1.16-1.65), 1.38(1.13-1.69), 1.67(1.40-1.98), 1.70(1.38-2.10), 1.59(1.04-2.43), all P <0.05]. Conclusion The prevalence of screen exposure among preschool children in China is relatively high, and relevant child health promotion strategies should be formulated to reduce its occurrence.

Objective To systematically describe and analyze the major factors influencing diabetes mellitus(DM)patients'foot self-care behaviors.Methods A computer-based search was conducted to retrieve observational studies on factors influencing DM patients'foot self-care behaviors from databases including PubMed,Web of Science,EMbase,Cochrane Library,CNKI,WanFang,VIP,CBM Datebase.The search was limited to articles published up to July 2024.Two separate researchers conducted an independent review,data extraction,and quality assessment of the retrieved articles,applying both inclusion and exclusion criteria.Subsequently,a Meta-analysis focusing on the influencing factors was performed utilizing Stata 17.0 software.Results A total of 17 articles met the criteria and were included in the study.The Meta-analysis results showed that good foot self-care was associated with education level,diabetes duration,place of residence,hypertension,insulin use,health education,regular follow-up visits,medication adherence,and self-monitoring of blood glucose.Conclusion There are multiple factors influencing DM patients'foot self-care.Healthcare providers can identify low levels of foot self-care behaviors early based on relevant factors and intervene accordingly to promote positive clinical outcomes for patients.