June 2017
Volume 58, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2017
Myopigenic activity change and its risk factors in urban students in Beijing
Author Affiliations & Notes
  • Balamurali Vasudevan
    Vision Science, MidWestern University, Glendale, Arizona, United States
  • Kenneth J Ciuffreda
    SUNY Optometry, New York, New York, United States
  • Zhong Lin
    Wenzhou Medical University, Wenzhou, China
  • Guang Yun Mao
    Wenzhou Medical University, Wenzhou, China
  • Hong Jia Zhou
    Wenzhou Medical University, Wenzhou, China
  • Ning Li Wang
    Beijing Tongren Hospital, Beijing, China
  • Yuan Bo Liang
    Wenzhou Medical University, Wenzhou, China
  • Footnotes
    Commercial Relationships   Balamurali Vasudevan, None; Kenneth Ciuffreda, None; Zhong Lin, None; Guang Yun Mao, None; Hong Jia Zhou, None; Ning Wang, None; Yuan Bo Liang, None
  • Footnotes
    Support  Beijing Science & Technology Novel Star Program (2009B44), Research Startup Project of Wenzhou Medical University (89213008)
Investigative Ophthalmology & Visual Science June 2017, Vol.58, 2377. doi:
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      Balamurali Vasudevan, Kenneth J Ciuffreda, Zhong Lin, Guang Yun Mao, Hong Jia Zhou, Ning Li Wang, Yuan Bo Liang; Myopigenic activity change and its risk factors in urban students in Beijing. Invest. Ophthalmol. Vis. Sci. 2017;58(8):2377.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : To investigate the myopigenic activity change and its risk factors in urban students in Beijing over a three-year period.

Methods : 241school children aged 6-17 years from the Beijing Myopia Progression Study (BMPS) were re-examined 3 years after their baseline enrollment. A detailed validated questionnaire was administered to assess activities at both time periods. 217 children (90.0%) with completed questionnaire data were included in the present analysis.

Results : Primary students had significant increases in outdoor sports time (3.49±4.29 vs. 2.42±3.01 hours/week, p=0.02), near work time (32.12±13.41vs. 24.84±9.21 hours/week, p<0.001), diopter hours (128.75±53.32 vs. 97.52±35.94 diopter hours/week, p<0.001), and indoor time (53.79±22.84 vs. 41.43±16.84 hours/week, p<0.001) at follow-up. Both primary and secondary students had significant decreases in number of books read for pleasure per week (primary: 0.95±0.22 vs. 2.13±2.42, p<0.001; secondary: 0.78±0.42 vs. 1.86±1.49, p<0.001). Both primary and secondary female students spent less time on outdoor sports (primary: 2.31 ± 3.48 vs. 4.55 ± 4.68 hours/week, p=0.004; secondary: 2.32 ± 2.61 vs. 5.87 ± 5.43hours/week, p<0.001), and total time outdoors (primary: 11.58 ± 9.03 vs. 14.60 ± 9.23 hours/week, p=0.07; secondary: 9.33 ± 7.15 vs. 12.88 ± 10.23 hours/week, p=0.06) than males at follow-up. In the multivariate regression analysis, after adjusting for student’s age and gender, for primary students, the more paternal educational years, the greater the reduction in time spent outdoors at follow-up (β=-0.67, p=0.049), while the greater the pressure to study, the more increase in time spent on near work (β=0.85, p=0.048) and indoors (β=1.53, p=0.02). For secondary students, the more paternal educational years, the greater increase in time spent indoors (β=2.54, p=0.055).

Conclusions : The primary students’ activities became more myopigenic, with female students having a more myopigenic activity pattern. The paternal educational years and pressure to study were two main risk factors for the myopigenic activity change.

This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.

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