Table 1 Characteristics of the study participants (N = 71,838)
Characteristics | n | Male n (%) | Female n (%) | |
|---|---|---|---|---|
Age (years) | 7 | 6761 | 3386 (50.1) | 3375 (49.9) |
| Â | 8 | 7621 | 3987 (52.3) | 3634 (47.7) |
| Â | 9 | 7678 | 4002 (52.1) | 3676 (47.9) |
| Â | 10 | 7645 | 3963 (51.8) | 3683 (48.2) |
| Â | 11 | 8366 | 4347 (52.0) | 4019 (48.0) |
| Â | 12 | 7780 | 4115 (52.9) | 3665 (47.1) |
| Â | 13 | 5965 | 3107 (52.1) | 2858 (47.9) |
| Â | 14 | 5419 | 2824 (52.1) | 2595 (47.9) |
| Â | 15 | 4573 | 2404 (52.6) | 2169 (47.4) |
| Â | 16 | 3345 | 1562 (46.7) | 1783 (53.3) |
| Â | 17 | 3340 | 1423 (42.6) | 1917 (57.4) |
| Â | 18 | 2467 | 1115 (45.2) | 1352 (54.8) |
| Â | 19 | 878 | 372 (42.4) | 506 (57.6) |
Nationality | Han | 45,021 | 23,571 (52.4) | 21,450 (47.6) |
| Â | Uyghur | 12,763 | 5914 (46.3) | 6849 (53.7) |
| Â | Kazakh | 1495 | 769 (51.4) | 726 (48.6) |
| Â | Kyrgyz | 5277 | 2639 (50.0) | 2638 (50.0) |
| Â | Hui | 5298 | 2735 (51.6) | 2563 (48.4) |
| Â | Others | 1984 | 979 (49.3) | 1005 (50.7) |
Education stage | Primary school | 45,982 | 24,035 (52.3) | 21,947 (47.7) |
| Â | Junior high school | 16,068 | 8318 (51.8) | 7750 (48.2) |
| Â | High school | 9788 | 4254 (43.5) | 5534 (56.5) |
Spherical Equivalent (SE) | SE≤-6.00 D | 1128 | 547 (48.5) | 581 (51.5) |
|  | -6.00 D < SE≤-5.00 D | 1658 | 764 (46.1) | 894 (53.9) |
|  | -5.00 D < SE≤-4.00 D | 2830 | 1313 (46.4) | 1517 (53.6) |
|  | -4.00 D < SE≤-3.00 D | 3958 | 1887 (47.7) | 2071 (52.3) |
|  | -3.00 D < SE≤-2.00 D | 5995 | 2828 (47.2) | 3167 (52.8) |
|  | -2.00 D < SE≤-0.50 D | 19,937 | 9855 (49.4) | 10,082 (50.6) |
|  | -0.50 D < SE < 0.50 D | 32,244 | 17,159 (53.2) | 15,085 (46.8) |
|  | 0.50 D ≤ SE < 1.00 D | 2715 | 1532 (56.4) | 1183 (43.6) |
|  | 1.00 D ≤ SE | 1373 | 722 (52.6) | 651 (47.4) |
| Â | Total | 71,838 | 36,605 (51.0) | 35,231 (49.0) |