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To explore the vitamin D nutritional status and influencing factors of primary and middle school students in poverty areas of Guizhou Province, and to provide scientific basis for the development of targeted nutritional improvement measures.
A total of 2,519 students from 4 primary and 4 middle schools in 9 key monitoring counties (districts) in Guizhou Province, where the Nutrition Improvement Program for Rural Compulsory Education Students was implemented in 2023, were selected for questionnaire surveys, physical examinations, and blood biochemistry tests using multistage cluster sampling methods. Multifactorial logistic regression was used to analyze the current status of vitamin D nutrition and its influencing factors.
The average vitamin D level of primary and middle school students in poverty areas of Guizhou Province was (22.59±6.66)ng/ml, and the rate of low vitamin D was 37.51%. The prevalence of low vitamin D among female students (46.17%) was higher than that of male students (29.11%), and the difference was statistically significant (χ2=78.213, P<0.001). There was a significant difference in the rate of low vitamin D among students in different regions (χ2=23.454, P<0.001), and the rate of low vitamin D tended to increase with age (χ2=44.905, P<0.001). The results of multifactorial logistic regression analysis showed that, compared with the corresponding reference group, ethnic minorities (OR=0.706, 95% CI: 0.590-0.844), physical activity ≥60 min/d (OR=0.791, 95% CI: 0.663-0.943), and living in the countryside (OR=0.747, 95% CI: 0.616-0.906) were protective factors for low vitamin D levels; obesity (OR=2.133, 95% CI: 1.390-3.272), female students (OR=2.238, 95% CI: 1.882-2.662), the 11-13 years old group (OR=1.849, 95% CI: 1.521-2.248) and the 14-17 years old group (OR=2.000, 95% CI: 1.576-2.539) were risk factors for low vitamin D levels.
High rates of low vitamin D among primary and middle school students in poverty areas of Guizhou Province require the development of personalized nutritional interventions to improve vitamin D nutritional status.
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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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