Xin Zhang, Jingwen Liu, Xiaolu Liu, Rulan Shangguan, Xiaofen D Hamilton, Jianmin Guan, Dwan Bridges
Cross-validation and modifications of the perceived mattering questionnaire-Physical education in Chinese inservice physical education teachers
Frontiers in psychology
precision evaluating underweight overweight status among children adolescents paramount averting health developmental issues existing standards assessments faced scrutiny regarding validity study investigates age height dependencies within international standards set international obesity task force iotf relying body mass index bmi contrasts japanese standards utilizing percentage overweight pow scrutinized comprehensive database comprising 7863520 children aged 517 years sourced school health statistics research initiative conducted japans ministry education culture sports science technology employing quantile regression method dissected structure weightforheight distributions across different ages sexes quantifying potentially biased assessments underweight overweight status conventional criteria applying ioft criteria underweight assessment revealed pronounced height dependence males aged 1113 females aged 1011 notably discernible bias emerged wherein children lower 25th percentile classified underweight five times frequently upper 25th percentile similarly overweight assessment displayed robust height dependence males aged 811 females aged 710 children lower 25th percentile height deemed obese four five times frequently counterparts upper 25th percentile furthermore using japanese pow criteria assessment revealed significant age dependence addition considerably underestimating percentage underweight overweight cases age seven however height dependence pow criterion smaller bmi criterion difference height classes less 3fold findings underscore intricacies agedependent changes body composition growth process children emphasizing absence gold standards assessing underweight overweight careful judgment crucial cases short tall stature age surpassing sole reliance conventional criteria results