Lan Guo|Jiezheng Yang|Jianning Mai|Xueying Du|Yangfeng Guo|P Li|Yue Yuan|Da-Wei Tang|Ciyong Lu|Zhang Wh
Prevalence and associated factors of myopia among primary and middle school-aged students: a school-based study in Guangzhou
Sun Yat-sen University|Guangzhou Center for Disease Control and Prevention|Guangzhou Center for Disease Control and Prevention|Guangzhou Center for Disease Control and Prevention|Guangzhou Center for Disease Control and Prevention|Sun Yat-sen University|Sun Yat-sen University|Sun Yat-sen University|Sun Yat-sen University|Université Libre de Bruxelles
purposeto estimate prevalence myopia among primary middle schoolaged students guangzhou explore potentially contributing factors myopiamethodsthis crosssectional study based sample students grades 16 grades 79 data collected refractive error measurements structured questionnaireresultsa total 3055 participants involved analysis overall prevalence myopia 474 95 confidence interval ci 456492 prevalence myopia students increased along growth grade level prevalence myopia students grade 1 02 increased 388 students grade 3 rate highest 684 students grade 9 girls higher risk myopia boys adjusted odds ratio122 95 ci104144 male female students whose distance reading longer 25 cm less likely myopia one two myopic parents higher risk myopia addition reading pleasure 2 h per day adjusted odds ratio184 95 ci109312 positively associated myopia boys spending time watching television per week positively associated myopia girlsconclusionmyopia students significant public health problem guangzhou female gender higher grade longer time spent near work shorter distance near work parental myopia shown associated increasing risk myopia children