Full
Outline
To explore the reference values of percentage body fat (PBF) for obesity screening in children and adolescents, in order to provide a reference for the development of rapid assessment tools for obesity among primary and secondary school students, and the promotion of obesity screening work among children and adolescents.
A stratified cluster sampling method was used to include subjects from Putuo District, Shanghai in September 2024. Basic information and anthropometric data were collected from 2 270 primary and secondary school students. The χ2 test and rank-sum test were used for data analysis with SPSS 29.0. Fitted curves were used to analyze the trend of PBF across sex and age, and optimal cut-points for obesity screening were determined by plotting receiver operating characteristic (ROC) curves.
The students were aged 7-17 years, with a mean age of 11.85±3.10 years. The detection rate of simple obesity was 16.8%, and the rate of central obesity was 22.1%. With increasing age, PBF in boys first increased and then decreased, whereas that in girls showed a general upward trend. Sex differences in PBF emerged after the age of 10 years (P<0.05). ROC curve analysis showed that the model fitting values were all >0.5, and the AUCs of PBF for obesity screening exceeded 0.900 across sex and age groups, with both sensitivity and specificity generally >80%.
PBF is highly valuable as an obesity screening indicator and can accurately and intuitively reflect body fat content and its changes in children.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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