![Sample our Bioscience journals, sign in here to start your access, Latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5925/TOC-Subject-Sample-2021-Bioscience.jpg"})
ABSTRACT
Purpose: To investigate the myopigenic activity change and its risk factors in urban students in Beijing.
Methods: A total of 241 primary or secondary students aged 6–17 years from the Beijing Myopia Progression Study (BMPS) were re-examined 3 years after their baseline enrollment. A detailed questionnaire was administered to assess myopigenic activities at both baseline and at the 3-year follow-up. Altogether, 217 students (90.0%) with completed data were included in the analysis.
Results: Compared to baseline, primary students (n = 123) had significant increases in outdoor sports time (mean ± standard deviation: 3.5 ± 4.3 vs. 2.4 ± 3.0 hours/week, p = 0.02), near work time (32.1 ± 13.4 vs. 24.8 ± 9.2 hours/week, p < 0.001), diopter hours (128.8 ± 53.3 vs. 97.5 ± 35.9 diopter hours/week, p < 0.001), and indoor time (53.8 ± 22.8 vs. 41.4 ± 16.9 hours/week, p < 0.001) at the 3-year follow-up. At both baseline and follow-up, females spent less time than males on outdoor sports (baseline: 2.4 ± 2.8 vs. 4.0 ± 5.2 hours/week, p = 0.006; follow-up: 2.3 ± 3.1 vs. 5.1 ± 5.0 hours/week, p < 0.001), and total outdoors (baseline: 11.9 ± 7.9 vs. 14.4 ± 9.5 hours/week, p = 0.03; follow-up: 10.5 ± 8.2 vs. 13.9 ± 9.6 hours/week, p = 0.005). In the multivariate regression analysis after adjustment by student’s gender, younger students had more increase in both near work time (slope = −0.99 hours/week for age, p = 0.009) and indoor time (slope = −2.04 hours/week for age, p = 0.001).
Conclusions: During the 3-year follow-up, primary students had more myopigenic activities. Female students had more myopigenic activities than males at both baseline and follow-up. Children’s age was a significant risk factor for this myopigenic activity change.
Acknowledgments
The authors thank Dr Yi Cao Zhang (Anyang Eye Hospital), Dr Xiao Dong Yang (Nanjing Tongren Hospital), Dr Qian Jia (Handan Eye Hospital), Dr Yue Wu (Beijing Xuanwu Hospital, Capital Medical University), and Dr Xiao Gu Cai (Beijing Tongren Hospital, Capital Medical University) for their invaluable assistance in data collection.
Declaration of interest
The authors report no conflicts of interest. The authors alone are responsible for the writing and content of this article.
Funding
The study was supported by the Wenzhou Medical University R&D Fund (QTJ13009), and the Beijing Science & Technology Novel Star Program (2009B44).