Table 1 Characteristics of the individuals included in the study
Characteristics | Total | Training set | Testing set |
|---|---|---|---|
Number of persons | 88250 | 52950 | 35300 |
Number of records | 408255 | 244953 | 163302 |
Male, number (%) | 45184 (51.2) | 27040 (51.1) | 18144 (51.4) |
Follow-up, mean ± SD, years | 3.4 ± 2.7 | 3.6 ± 2.1 | 3.3 ± 1.7 |
Age at first visit, mean ± SD, years | 7.7 ± 4.0 | 8.1 ± 3.5 | 7.6 ± 3.7 |
Age at last visit, mean ± SD, years | 14.3 ± 4.6 | 13.5 ± 4.0 | 14.5 ± 4.8 |
SE at first visit, mean ± SD, diopters | 0.4 ± 3.5 | 0.8 ± 2.8 | (− 0.1) ± 2.3 |
SE at last visit, mean ± SD, diopters | (− 1.3) ± 3.6 | (− 1.8) ± 3.2 | (− 1.2) ± 2.9 |