| Number of persons |
92,484 |
36,758 |
3,215 |
| Number of records |
517,949 |
169,114 |
17,113 |
| Female, number (%) |
49,215 (53.2) |
19,247 (52.4) |
1,476 (45.9) |
| Follow-up, mean ± SD (range), years |
4.6 ± 1.9 (2–11) |
5.2 ± 2.1 (2–11) |
4.1 ± 1.2 (3–5) |
| Age at first visit, mean ± SD, years |
8.1 ± 1.5 |
7.4 ± 1.2 |
6.9 ± 0.5 |
| Age at last visit, mean ± SD, years |
13.8 ± 4.9 |
14.6 ± 4.1 |
10.1 ± 1.3 |
| SE at the first visit, mean ± SD, dioptres |
−1.5 ± 1.8 |
−0.8 ± 1.5 |
0.8 ± 0.9 |
| SE at the last visit, mean ± SD, dioptres |
−3.6 ± 1.7 |
−3.9 ± 1.6 |
−1.3 ± 2.1 |
