Analysis of the Incidence of Myopia among Primary School Students in Changsha City from 2021 to 2023, along with Factors Influencing this Phenomenon

Objective: To understand the new cases of myopia among primary school students in Changsha City during the years 2021–2023, and to analyze the main factors contributing to the increase in myopia. Methods: A multi-stage sampling method was used to conduct vision tests on 4,321 students in grades 1–4 who were not previously diagnosed with myopia in 2021. These students were followed up for two years. Multivariable logistic regression analysis was used to determine the main factors contributing to the incidence of myopia among primary school students. Results: Based on data from students in grades 1–4 in Changsha City in 2021, the cumulative incidence of myopia after two years of follow-up was 28.33%. The cumulative incidence of myopia among boys (25.18%) was lower than that among girls…