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

The overall weighted correct response rate for weight management knowledge among Chinese school-aged children was 83.97%.

• 95% CI: 83.83%–84.10%
• Data drawn from the 2023–2024 China Nutrition and Health Knowledge Survey
• Survey covered 195 survey sites across 31 provinces, autonomous regions, and municipalities
• A total of 90,240 students from upper primary (grades 4–6), junior high, and senior high schools were included
• Multistage stratified cluster sampling design was applied with Taylor linearization method for standard error estimation

Female students had significantly higher weight management knowledge correct response rates than male students.

• Female students: 85.68%; male students: 82.49%
• Difference was statistically significant (P < 0.01)
• Group differences were assessed by t or Wald F tests based on the complex sampling design

Senior high school students demonstrated the highest level of weight management knowledge among the three educational stages.

• Senior high school weighted correct response rate: 86.21% (95% CI: 85.96%–86.45%)
• Compared to upper primary (grades 4–6) and junior high school students
• Knowledge level increased progressively with educational stage

Urban students performed significantly better than rural students on weight management knowledge.

• Urban students: 85.44%; rural students: 81.48%
• Difference was statistically significant (P < 0.01)

Students in eastern regions scored higher on weight management knowledge than peers in central and western regions.

• Eastern region weighted correct response rate: 85.80% (95% CI: 85.59%–86.00%)
• Central and western region students scored lower, though specific rates not provided in abstract
• Regional differences were assessed using complex sampling design statistical tests

Students showed the highest mastery in the knowledge domains of 'physical activity and sedentary behavior' and 'dietary misconceptions'.

• Weighted accuracy exceeded 88.00% for both domains
• These were the strongest knowledge areas across educational stages

'Healthy food choices' was the weakest knowledge domain, particularly among upper primary and junior high students.

• Upper primary students (grades 4–6): 70.15% (95% CI: 69.75%–70.54%)
• Junior high students: 70.75% (95% CI: 70.29%–71.20%)
• This domain was the weakest across all educational stages

Items related to 'avoiding fried foods when eating out' and 'making healthy dining-out choices' were common weak points across all educational stages.

• These specific items had notably low correct response rates across upper primary, junior high, and senior high students
• Both items fell within the 'healthy food choices' knowledge domain