| Characteristic | (1) Normal vision N = 1282 (57.0%) | (2) Poor uncorrected vision N = 966 (43.0%) | (3) visually impaired N = 699 (31.1%) | (4) Comparing normal vision with Poor uncorrected vision P-value (1)-(2) | (5) Comparing normal vision with visually impaired P-value (1)-(3) |
| Children’s Characteristics |
|
|
|
|
|
| Age (years) | 13.514 | 13.636 | 13.634 | 0.01b | 0.03 |
| Male sex | 741 (57.8) | 432 (44.7) | 313 (44.8) | P < 0.001 | P < 0.001 |
| Boarding at school | 933 (72.3) | 718 (74.3) | 511 (73.1) | 0.41 | 0.88 |
| Home first county | 494 (38.5) | 248 (25.7) | 207 (29.6) | P < 0.001 | P < 0.001 |
| Home second county | 348 (27.2) | 289 (29.9) | 216 (30.9) | 0.15 | 0.08 |
| Parental and Family Characteristics |
|
|
|
|
|
| Mothers’ education |
|
|
| 0.01 | 0.02 |
| Illiterate | 357 (28.2) | 219 (23.0) | 148 (21.5) |
|
|
| Not completing high school | 866 (67.6) | 693 (71.7) | 511 (73.1) |
|
|
| >12 years of education | 43 (3.5) | 40 (4.1) | 28 (4.0) |
|
|
| Fathers’ education |
|
|
| 0.51 | 0.23 |
| Illiterate | 110 (8.7) | 68 (7.1) | 44 (6.4) |
|
|
| Not completing high school | 1087 (84.8) | 813 (84.1) | 595 (85.2) |
|
|
| >12 years of education | 71 (5.5) | 74 (7.7) | 53 (7.6) |
|
|
| Both parents out-migrated for work | 101 (7.9) | 92 (9.5) | 73 (10.4) | 0.17 | 0.05** |