[Knowledge of weight management among Chinese school-aged children in 2023 to 2024].

OBJECTIVE: To assess the level and distribution of weight management knowledge among Chinese school-aged children at different educational stages. METHODS: Based on data from the 2023-2024 China Nutrition and Health Knowledge Survey of school-aged children, which covered 195 survey sites across 31 provinces(autonomous regions and municipalities), a multistage stratified cluster sampling design was applied. A total of 90 240 students from upper primary(grades 4-6), junior high, and senior high schools were included. Weighted analyses were performed according to the complex sampling design, with weights derived from sampling and post-stratification weights. Standard errors were estimated using the Taylor linearization method. Group differences were assessed by t or Wald F tests based on the complex sampling design. RESULTS: The overall weighted correct response rate for weight management knowledge was 83.97%(95%CI 83.83%-84.10%). Female students scored significantly higher than male students(85.68% vs.82.49%, P