Correlation between refractive development and physical growth indices in primary school students aged 6-9 years in Guangdong Province
10.16835/j.cnki.1000-9817.2024213
- VernacularTitle:广东省6~9岁小学生屈光与体格发育指标的相关性
- Author:
QU Yabin, WANG Shuang, YANG Bei, YU Shuiming, LIN Rong, HUANG Anzhong, LIN Siren, LI Meng, SHEN Shaojun, LIU Rong, CHEN Qiuxia, WANG Zixuan
1
Author Information
1. Department of Environmental and School Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou (511430) , Guangdong Province, China
- Publication Type:Journal Article
- Keywords:
Refraction,ocular;
Physical examination;
Myopia;
Regression analysis;
Students
- From:
Chinese Journal of School Health
2024;45(7):936-940
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the correlation between refractive errors and physical development indicators among primary school students aged 6 to 9, so as to provide a scientific basis for the development of effective prevention and control measures.
Methods:A stratified cluster random sampling method was used to recruit 2 833 elementary school students aged 6 to 9 from Guangdong Province for vision screening, ocular biometry, and physical examinations in Octorber, 2020. The Chi square test, t-test, and ANOVA were employed to compare myopia rates and indicator values across different groups. Multiple linear regression models were used to analyze the correlations between height, weight, and body mass index (BMI) with refractive development indicators.
Results:The screening myopia rate among primary school students aged 6 to 9 was 16.7%, and the myopia rate increased with age ( χ 2= 51.58 , P <0.01). The height and weight of the myopic group [(126.96±7.41)cm, (26.59±6.45)kg] were higher than those of the non myopic group [(124.76±7.77)cm, (25.42±5.87)kg] ( t =5.84, 3.65, P <0.01). The mean values of spherical equivalent (SE), axial length (AL), anterior chamber depth (ACD), and AL/corneal curvature radius (CR) ratio for students aged 6 to 9 were (-0.17±1.04)D, (22.96±0.78)mm, (3.38±0.24)mm, and (2.95±0.08), respectively, with statistically significant differences across different age and myopia severity groups ( t =37.08, 119.20, 41.54, 133.60; 935.30, 184.10, 73.95, 498.50, P < 0.01). After adjusting for gender, age, and residence, the multiple linear regression model showed that height was positively correlated with AL and CR, weight was positively correlated with ACD, and BMI was positively correlated with AL and ACD ( β = 0.191 , 0.070, 0.035, 0.013, 0.007, P <0.05). When stratified by myopia status, results for the non-myopic group were similar to the overall results, whereas in the myopic group, the correlations between height, BMI, and AL were not statistically significant ( P > 0.05).
Conclusions:Among primary school students aged 6 to 9, height and BMI are positively correlated with AL in the non myopic group but no similar correlation is observed in the myopic group, indicating that factors other than physical development, such as environmental and behavioral factors, should be considered for their impact on refractive development.
