Skip to main content
. 2018 Nov 6;15(11):e1002674. doi: 10.1371/journal.pmed.1002674

Fig 2. Overall distribution of the study population.

Fig 2

A total of 132,457 participants were recruited from 8 ophthalmic centres—4 centres in Guangzhou (Zhongshan Ophthalmic Centre [ZOC, 92,484, 69.82%], the Haizhu Optometry Department [HZD, 9,524, 7.19%], the Huangpu Optometry Department [HPD, 2,000,1.52%], and the Panyu Optometry Department [PYD, 3,815, 2.88%]) and 4 centres outside of Guangzhou (the Dongguan Guangming Ophthalmic Hospital [DGC, 12,200, 9.21%], the Optometry Centre in Huizhou City [HZC, 1,854, 1.40%], the Haikou Longhua Optometry Department [LHD, 1,775, 1.35%], and the Xiuying Optometry Department in Haikou City [HKC, 5,590, 4.22%])—and 2 non-medical (population-based) cohorts (the Guangzhou Outdoor Activity Longitudinal Trial [GOAL, 1,525, 1.15%] and the Refractive Error Longitudinal Study [RELS, 1,690, 1.28%]). The 8 ophthalmic centres and 2 cohorts are in South China and Southeast Asia and provided a representative big data sample.