Risk factors for myopia progression in second-grade primary school children in Taipei: a population-based cohort study

Purpose To evaluate the 1-year progression of myopia and associated risk factors in second-grade primary school children. Methods The myopia investigation study in Taipei provided semiannual visual acuity testing and cycloplegic refraction for all second-grade primary school children (mean age: 7.49 years) in Taipei who provided parental consent. A questionnaire was distributed to the participants' parents before the first and third examinations. We evaluated 1-year follow-up data for children noted to have myopia on the first examination. Multinomial logistic regression models were applied to assess risk factors associated with myopia progression. Myopia progression was categorised, based on the change in spherical equivalent (Delta SE) over 1 year, as slow (Delta SE>-0.5 dioptres (D)), moderate (-1.0 D