Baseline characteristics of study participants
| Variables | 0.02% atropine n=117 | 0.01% atropine n=119 | Control group n=100 | P value |
| Mean±SD | Mean±SD | Mean±SD | ||
| Age (years) | 9.4±1.8 | 9.3±1.9 | 9.5±1.4 | 0.18 |
| Body mass index (kg/m2) | 17.38±2.99 | 17.39±3.54 | 17.55±3.26 | 0.33 |
| Spherical equivalent refractive error (D) | −2.76±1.47 | −2.70±1.64 | −2.68±1.42 | 0.17 |
| Intraocular pressure (mm Hg) | 16.8±3.2 | 17.1±2.9 | 16.8±3.1 | 0.66 |
| Pupil diameter (mm) | 6.34±0.68 | 6.16±0.78 | 6.19±0.60 | 0.83 |
| Accommodative amplitude (D) | 15.27±5.19 | 15.21±4.36 | 16.00±5.45 | 0.62 |
| Axial length (mm) | 24.60±0.72 | 24.58±0.74 | 24.55±0.71 | 0.12 |
| Anterior chamber depth (mm) | 3.64±0.28 | 3.72±0.18 | 3.68±0.22 | 0.21 |
| Corneal curvature (D) | 42.78±1.52 | 42.82±1.35 | 42.98±1.05 | 0.13 |
| Corneal astigmatism (D) | 0.58±0.22 | 0.55±0.28 | 0.59±0.30 | 0.19 |
| Sex | ||||
| Male | 59 (50.4%) | 60 (50.4%) | 52 (52%) | 0.96 |
| Female | 58 (49.6%) | 59 (49.6%) | 48 (48%) | |
| Heredity | 0.99 | |||
| + + (both parents myopic) | 27 | 28 | 23 | |
| + − (one parent myopic) | 58 | 59 | 49 | |
| − − (neither parent myopic) | 32 | 32 | 28 |