Table 1 Basic characteristics of survey participants.
Characteristic | Overall | Myopia | Non-myopia | p-valueb |
|---|---|---|---|---|
N = 10,619 (100%)a | N = 6273 (59%)a | N = 4346 (41%)a | ||
Age (years) | 12.0 (9.0, 15.0) | 13.0 (11.0, 15.0) | 9.0 (7.0, 12.0) | < 0.001 |
Sex | < 0.001 | |||
Male | 5473 (51.5%) | 3102 (49.5%) | 2371 (54.6%) | |
Female | 5146 (48.5%) | 3171 (50.5%) | 1975 (45.4%) | |
Ethnicity | 0.042 | |||
Han | 8621 (81.2%) | 5133 (81.8%) | 3488 (80.3%) | |
Non-Han | 1998 (18.8%) | 1140 (18.2%) | 858 (19.7%) | |
Region | < 0.001 | |||
Urban | 5635 (53.1%) | 3439 (54.8%) | 2196 (50.5%) | |
Rural | 4984 (46.9%) | 2834 (45.2%) | 2150 (49.5%) | |
Educational stage | < 0.001 | |||
Primary school | 5468 (51.5%) | 2316 (36.9%) | 3152 (72.5%) | |
Middle school | 2653 (25.0%) | 1933 (30.8%) | 720 (16.6%) | |
High school | 2498 (23.5%) | 2024 (32.3%) | 474 (10.9%) |
