Table 1 Characteristics of the 714 study participants and their right eyes at the baseline and follow-up examination

Age, median (IQR), years

11.5 (0.6)

16.6 (0.3)

Follow-up time, median (IQR), years

–

5.1 (0.5)

Best corrected visual acuity, mean (SD), ETDRS letters

89 (3)

91 (4)

Spherical equivalent refractive error, median (IQR)

0.0 (0.6)

−0.125 (0.5)

Myopia ≤ − 0.50 D, No. (%)

84 (12)

174 (24)

Incident myopia, No. of cases/No. at risk (%)

–

120/630 (19)

Axial length, mean (SD), mm

23.2 (0.8)

23.5 (0.9)

Five-year change in axial length, median (IQR), μm

–

248 (225)

Subfoveal choroidal thickness, mean (SD), μm

361 (77)

–

Body height, mean (SD), cm

152 (7)

173 (9)

Body weight, median (IQR), kg

40.9 (11)

63.4 (14)

Body mass index, median (IQR), kg/m²

17.6 (3)

20.9 (4)