Table 1. Demographics of participants.
| Variable | Control group (n=60) | Atropine group (n=125) | P |
| Age, y, mean±SD | 9.52±1.36 | 9.47±1.42 | 0.842 |
| 6 to <7 | 0 | 3 (2.4) | |
| 7 to <8 | 4 (6.7) | 10 (8.0) | |
| 8 to <9 | 12 (20.0) | 17 (13.6) | |
| 9 to <10 | 12 (20.0) | 34 (27.2) | |
| 10 to <11 | 17 (28.3) | 23 (18.4) | |
| 11 to <12 | 11 (18.3) | 32 (25.6) | |
| 12 to <13a | 4 (6.7) | 6 (4.8) | |
| Male/female | 30/30 | 58/67 | 0.648 |
aThese patients were younger than 12 years old at the time of enrolment and 10 of them were between 12 and 13 years old after the 6-month observation period.
n (%)