|  | Wearing glasses | Not wearing glasses | P value | OR (95% CI) |
---|---|---|---|---|---|
N (%) | N (%) | ||||
Sex | Male | 167 (53.7) | 949 (55.99) | Â | 1 |
Female | 144 (46.30) | 746 (44.01) | 0.4959 | 1.10 (0.86,1.40) | |
Grade | 1 | 27 (8.68) | 211 (12.45) | Â | 1 |
2 | 32 (10.29) | 273 (16.11) | 0.7514 | 0.92 (0.53,1.58) | |
3 | 51 (16.40) | 342 (20.18) | 0.5462 | 1.17 (0.71,1.92) | |
4 | 82 (26.37) | 417 (24.60) | 0.0703 | 1.54 (0.97,2.45) | |
5 | 119 (38.26) | 452 (26.67) | 0.0016 | 2.06 (1.31,3.22) | |
Age (y) | 7–8 | 37 (11.90) | 316 (18.64) |  | 1 |
9–10 | 108 (34.73) | 588 (34.69) | 0.0265 | 1.57 (1.05,2.34) | |
11–12 | 166 (53.38) | 791 (46.67) | 0.0026 | 1.79 (1.23,2.62) | |
All | Â | 311 (100.00) | 1695 (100.00) | Â | Â |