Table 1.
Distribution of Sample Schools and Students
| Number of Schools | Number of Students in Sample Schools | Number of Students Who Need Glasses | Percentage of Students | |
|---|---|---|---|---|
| All sample | 168 | 13,795 | 2,189 | 15.9 |
| By county | ||||
| County 1 | 7 | 500 | 100 | 4.6 |
| County 2 | 7 | 419 | 60 | 2.7 |
| County 3 | 10 | 762 | 145 | 6.6 |
| County 4 | 8 | 610 | 191 | 8.7 |
| County 5 | 8 | 581 | 61 | 2.8 |
| County 6 | 14 | 1,174 | 270 | 12.3 |
| County 7 | 9 | 700 | 144 | 6.6 |
| County 8 | 16 | 1,400 | 115 | 5.3 |
| County 9 | 8 | 659 | 67 | 3.1 |
| County 10 | 1 | 75 | 12 | 0.6 |
| County 11 | 16 | 1,516 | 224 | 10.2 |
| County 12 | 8 | 720 | 168 | 7.7 |
| County 13 | 16 | 1,580 | 209 | 9.6 |
| County 14 | 8 | 703 | 50 | 2.3 |
| County 15 | 4 | 246 | 39 | 1.8 |
| County 16 | 11 | 785 | 136 | 6.2 |
| County 17 | 9 | 683 | 122 | 5.6 |
| County 18 | 8 | 682 | 76 | 3.5 |
| By treatment | ||||
| Control | 42 | 3,587 | 510 | 23.3 |
| Education | 42 | 3,310 | 526 | 24.0 |
| Free eyeglasses, No education | 42 | 3,462 | 527 | 24.1 |
| Free eyeglasses, Education | 42 | 3,436 | 626 | 28.6 |
| By gender | ||||
| Female | NA | 6,584 | 1,109 | 50.7 |
| Male | NA | 7,182 | 1,080 | 49.3 |
| By Province | ||||
| Gansu | 80 | 7121 | 802 | 11.3 |
| Shaanxi | 88 | 6674 | 1387 | 20.8 |
Note: Data source, baseline survey.