Fig. 1From: Association of Myopia with cognitive function among one million adolescentsFlow diagram of selected study population. *Missing values: cognitive function score: 4553 (0.4%); country of origin: 7558 (0.6%); socioeconomic status: 4927 (0.4%); height: 384 (0.03%); body mass index: 642 (0.1%); years of education: 210 (0.02%)Back to article page