Prevalence survey of myopia among different nationalities students in Karamay city

Abstract

Objective To evaluate the myopia epidemiological situation of different nationality students in primary and secondary schools in Karamayi City.Methods This survey was a cross-sectional design,the sample was selected in the first,third and sixth grade primary school and middle school students by stratified random cluster method.According to the research needs to design questionnaires,the survey team comprised of ophthalmologists,technicians,optometrists and administrative staff,the staff was trained before investigation,pre-survey.A database was established using the EPI-data software by double entry method.All statistical analysis was completed by SPSS 17.0 software.Results Among 2103 eligible students,1922 (91.4％) were finally enrolled in the present study.Of 147 (7.6％) were excluded from the final sample due to incompleted examination.The total prevalence of myopia was 39.2％ (695).The prevalence in Han nationality students was 45.2％ and 17.2％ in Uygur nationality students,there was statistical significant difference between different nation (x2=86.079,P =0.000).The prevalence in girl students was much higher than that in boy students,there was statistical significant difference between different gender (x2=14.494,P =0.000);there was a statistical significant difference between age groups (x2=321.281,P =0.000; x2=20.001,P =0.001); there was no statistical significant in different blood types (x2=5.284,P =0.152; x2=1.763,P =0.623).The different prevalence between the three groups,that parents were both myopia,one of the parents was myopia,and both were normal in Han nationality,had a statistical significant.(x2=14.827,P =0.002).The different prevalence between the three groups,that often eating sweets,never eating sweets,and eating sweets occasionally,had a statistical significant,with the prevalence of the first group was higher than the others (x2=6.830,P =0.033; x2=1.977,P =0.372).There was statistical significant in the different prevalence between different daily reading and writing time for Han students.And often more time mean higher prevalence (x2=86.584,P =0.000).While,there was no significant for the Uygur students.There was statistical significant for the different prevalence between the different daily outdoor activities,with longer time mean lower prevalence (x2=37.866,P =0.000; x2=12.110,P =0.002).Conclusions It is often happen for the students to become myopia,so in the multi-ethnic region,we should take corresponding measures and social intervention to prevent it. Key words: Ethnic; Students in primary and secondary schools; Prevalence of myopia