Table 1

Demographic and refractive characteristics of the cohort

Age	N	Age (mean±SD)	Gender (female, %)	Sphere (mean±SD)
All	630 487	43.4±18.2	59.8	−2.8±2.3
14–19	64 600	16.4±1.7	57.9	−2.5±2.0
20–24	49 902	22.0±1.4	64.0	−2.8±2.2
25–29	52 702	27.0±1.4	63.4	−2.9±2.3
30–34	54 562	32.0±1.4	62.9	−3.0±2.4
35–39	53 164	37.0±1.4	61.8	−2.9±2.4
40–44	62 397	42.1±1.4	60.8	−2.8±2.4
45–49	67 313	47.0±1.4	58.6	−2.8±2.5
50–54	56 184	51.9±1.4	56.8	−2.9±2.6
55–59	44 617	56.9±1.4	55.9	−3.0±2.6
60–64	35 988	61.9±1.4	55.5	−3.0±2.5
65–69	29 937	66.9±1.4	56.2	−2.7±2.2
70–74	19 810	71.9±1.4	55.8	−2.3±1.9
75–79	17 240	77.0±1.4	59.3	−2.0±1.7
80–84	13 665	81.8±1.4	64.2	−1.9±1.5
85–100	8406	87.6±2.5	69.3	−2.0±1.5
30–100	463 283	51.4±14.3	59.2	−2.8±2.4
With progression status	178 886	51.2±14.6	61.7	−2.8±2.4
14–29	167 204	21.4±4.7	61.5	−2.7±2.1
With progression status	87 631	20.6±4.7	63.0	−2.7±2.2
With mild or moderate myopia	153 740	21.3±4.7	61.6	−2.2±1.4

Progression status is defined for individuals with a prescription between 12 and 26 months after baseline. Mild or moderate myopia is defined as an SE > –6.00 D.
SE, spherical equivalent.