Table 1. Participants’ Baseline Characteristics.
| Characteristic | Participants, mean (SD) | |
|---|---|---|
| Control (n = 168) | Treatment (n = 168) | |
| Sex, No. (%) | ||
| Female | 86 (51.2) | 90 (53.6) |
| Male | 82 (48.8) | 78 (46.4) |
| Age, y | 9.0 (1.9) | 9.1 (2.0) |
| Body mass indexa | 17.7 (3.7) | 17.4 (3.8) |
| Spherical equivalent error, D | ||
| Overall | −1.3 (1.5) | −1.4 (1.6) |
| Children with myopia | −2.1 (1.2) | −2.2 (1.2) |
| Children without myopia | 0.3 (0.5) | 0.2 (0.6) |
| Axial length, mm | ||
| Overall | 23.8 (1.0) | 23.9 (1.1) |
| Children with myopia | 24.2 (0.8) | 24.3 (0.9) |
| Children without myopia | 23.1 (0.7) | 23.1 (0.8) |
| Intraocular pressure, mm Hg | 15.4 (2.8) | 14.9 (2.8) |
| Central corneal thickness, μm | 546.3 (32.8) | 543.9 (31.4) |
| Anterior chamber depth, mm | 3.1 (0.3) | 3.2 (0.3) |
| Length thickness, mm | 3.4 (0.1) | 3.4 (0.2) |
| Subfoveal choroid thickness, μm | 299.3 (68.2) | 291.4 (71.6) |
| K1, D | 42.9 (1.3) | 43.0 (1.4) |
| K2, D | 44.1 (1.4) | 44.2 (1.6) |
| Astigmatism, D | 1.2 (0.5) | 1.2 (0.6) |
Abbreviations: D, diopter; K1, flat keratometry; K2, steep keratometry.
a
Body mass index is calculated as weight in kilograms divided by height in meters squared.