Time Use and Prevalence of Myopia among Chinese Adolescents
Objective: Myopia has been a long-standing epidemic in China. Although previous research has reported an association between time spent outdoors and myopia, no study has examined how the general pattern of time use among different activities (e.g., sleep, study etc.) may be related to risk of myopia. This study intends to identify time use patterns among Chinese adolescents between ages 10 and 18, and explore whether different patterns are related to different prevalence of myopia. Methods: Data were from the nationally representative China Family Panel Studies (CFPS). Both vision status and time use data were self–reported. Results: Latent class analysis identified three major patterns of time use among 4,881 Chinese adolescents in 2010: the “balanced class” (61.3%) had reasonable amount of study hours per day (mean=8.83), sufficient sleep (mean=8.83) and average leisure time (mean=3.09); the “study concentrated class” (19.6%) was characterized by prolonged study hours (mean=11.76), less sleep time (mean=7.62) and leisure time (mean=1.89); the “working and playing class” (18.8%) spent little time studying (mean=.69) but more time working (mean=4.97) and engaging in leisure activities (mean=4.11). Risk of myopia was the same in “balanced class” and “working and playing class”, but the “study concentrated class” had a two-fold risk (OR=2.17, 95% CI=1.64, 2.88). Conclusion: Different time use patterns are associated with different risks of myopia. Adolescents with long hours of study time have higher risk of myopia, while those with balanced hours of time use have the same level of risk with those who spend little time study.
Public health or related research
Social and behavioral sciences
Identify different patterns of time use among Chinese adolescents.
Analyze whether different patterns of time use are related to prevalence of myopia.
Keyword(s): Adolescents, Vision Care
Presenting author's disclosure statement:
Qualified on the content I am responsible for because: I am an assistant research professor at Peking University in China, and one of my research areas is cognitive and non-cognitive development of children and adolescents. Before my current position, I was a research associate at the Harvard Center for Population and Development Studies, working extensively with large scale survey data.
Any relevant financial relationships? No
I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines,
and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed
in my presentation.