Analysis of myopia and its influence factors of primary school students in Chongqing city

Abstract

Objective To survey the visual situation of primary school students in Chongqing city,and to explore the influence factors of myopia.Methods A cross-sectional survey was conducted to select 1100 students in primary school in 3 districts of Chongqing with a multistage cluster randomized sampling method.The student was investigated by questionnaires and the myopia was examined.Results The myopia prevalence of the primary school students in Chongqing city was 32.91％ (362/1100) (95％ CI:30.13％-35.69％).This rate increased from 9.84％ (18/183) in 7-year-old to 59.20％ (74/125) in 12-year-old.With increasing age,the prevalence of myopia among males and females showed an increasing trend with age (male:x2=76.457,P=0.000; female:x2=43.815,P =0.000).The myopia rate of the female 33.01％ (169/512) was higher than the male 32.82％ (193/588) and this difference did not reach statistical significant (x2=0.004,P =0.948).Myopia was related to parents' myopia,parents' level of education,short range reading,reading in bed,playing small games and whether watching television.Conclusions There is a high prevalence of myopia in Chongqing city.It is necessary to take comprehensive measures to preserve eyesight,such as,focusing on the students whose parents are shortsighted and highly educated,and building the self-control to correct bad behavior of reading,strengthening the physical exercises,reducing the frequency of playing games,enriching their after school life and so on. Key words: Myopia ; Risk factor ; Primary student ;