Table 2. Eye exercises use among cases and controls.
| All (n = 201) | Myopia onset (n = 60) |
Myopia progression (n = 141) |
|||
|---|---|---|---|---|---|
| Cases* (n = 18) | Controls (n = 42) | Cases** (n = 63) | Controls (n = 78) | ||
| Frequency | |||||
| ≥5/week | 44 (21.9) | 2 (11.1) | 12 (28.6) | 14 (22.2) | 16 (20.5) |
| 1–4/week | 54 (26.9) | 8 (44.4) | 8 (19.0) | 18 (28.6) | 20 (25.6) |
| No exercise | 103 (51.2) | 8 (44.4) | 22 (52.4) | 31 (49.2) | 42 (53.8) |
| Performance score | |||||
| ≥30 | 79 (39.3) | 9 (50.0) | 17 (40.5) | 24 (38.1) | 29 (37.2) |
| 1–29 | 19 (9.5) | 1 (5.6) | 3 (7.1) | 8 (12.7) | 7 (9.0) |
| 0 | 103 (51.2) | 8 (44.4) | 22 (52.4) | 31 (49.2) | 42 (53.8) |
| Group | |||||
| High quality | 31 (15.4) | 1 (5.6) | 11 (26.2) | 7 (11.1) | 12 (15.4) |
| Low quality | 67 (33.3) | 9 (50.0) | 9 (21.4) | 25 (39.7) | 24 (30.8) |
| No exercise | 103 (51.2) | 8 (44.4) | 22 (52.4) | 31 (49.2) | 42 (53.8) |
*Cases were non-myopic children who have myopia-onset during the follow-up. Controls were children who did not have myopia-onset during the follow-up.
**Cases were myopic children who have myopic progression ≥1.0D during the follow-up. Controls were myopic children who have myopic progression <1.0D during the follow-up.