Table 1 Distribution by gender, age and division within the different methods of case ascertainment.
| Special education | CBR | Key informants | Total | |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |
| Gender p = 0.001* | ||||
| Boys | 280 (71.1) | 180 (60.8) | 760 (61.0) | 1220 (63.0) |
| Girls | 114 (28.9) | 116(39.2) | 485 (39.00) | 715 (37.0) |
| Age (years) p = 0.001* | ||||
| 0−5 | 8 (2.0) | 42 (14.2) | 247 (19.8) | 297 (15.3) |
| 6−10 | 121 (30.7) | 86 (29.0) | 168 (32.5) | 611 (31.6) |
| 11–15 | 265 (67.3) | 168 (56.8) | 594 (47.7) | 1027 (53.1) |
| Visual acuity p = 0.008 | ||||
| SVI | 19 (4.8) | 23 (7.8) | 122 (9.8) | 164 (8.5) |
| Blind | 375 (95.2) | 273 (92.2) | 1123 (90.2) | 1771 (91.5) |
| Dwelling p<0.001* | ||||
| Rural | 344 (87.3) | 287 (97.0) | 1216(97.7) | 1847 (95.5) |
| Urban | 50 (12.7) | 9 (3.0) | 29 (2.3) | 88 (4.5) |
| Family history† p = 0.164 | ||||
| Yes | 91 (23.1) | 76 (25.8) | 259 (20.9) | 426 (22.1) |
| No | 303 (76.9) | 219 (74.2) | 982 (79.1) | 1504 (77.9) |
| History of consanguinity‡ p = 0.77* | ||||
| Yes | 62 (17.0) | 56 (19.2) | 222 (18.0) | 340 (18.0) |
| No | 302 (83.0) | 235 (80.8) | 1010 (82.0) | 1547 (82.0) |
| Age of onset p<0.001* | ||||
| Congenital | 139 (35.3) | 112 (37.8) | 361 (29.0) | 612 (31.6) |
| Infantile§ | 46 (11.7) | 56 (18.9) | 312 (25.1) | 414 (21.4) |
| 1 to <5 years | 135 (34.3) | 94 (31.8) | 363 (29.2) | 592 (30.6) |
| 5 to <16years | 74 (18.8) | 34 (11.5) | 209 (16.8) | 317 (16.4) |
| Disability p = 0.005* | ||||
| Yes | 7 (1.8) | 17 (5.7) | 72 (5.8) | 96 (5.0) |
| No | 387 (98.2) | 279 (94.3) | 1173 (94.2) | 1839 (95.0) |
| Total | 394 (100) | 296 (100) | 1245 (100) | 1935 (100) |
*χ2 test showing significant differences between the ascertainment methods in gender, age, visual acuity, dwelling, age of onset and disability. postnatal to <1 year.
CBR, community‐based rehabilitation; SVI, severe visual impairment.