Comparison of those included in baseline and those successfully followed up 6 months later
| Before correction | After correction (6 months) | P value | ||
| Total screened n=209 | Successfully follow-up (n=157, 75.1%) | Loss-to-follow-up (n=52, 24.9%) | ||
| Locations | ||||
| Unguja | 111 (53.1%) | 75 (47.8%) | 36 (69.2%) | p<0.001 |
| Pemba | 98 (46.9%) | 82 (52.2%) | 16 (30.8%) | |
| Age group (years) | ||||
| 40–50 | 102 (48.8%) | 79 (50.3%) | 23 (44.2%) | p<0.001 |
| >50 years old | 107 (51.2%) | 78 (49.7%) | 29 (55.8%) | |
| Level of education | ||||
| No formal education | 24 (11.6%) | 18 (11.5%) | 6 (11.8%) | p=0.373 |
| Did not complete primary | ||||
| Education | 26 (12.6%) | 20 (12.8%) | 6 (11.8%) | |
| Completed primary education | 94 (45.4%) | 66 (42.3%) | 28 (54.9%) | |
| Completed secondary education | 63 (30.4%) | 52 (33.3%) | 11 (21.6%) | |
| Missing=2 | ||||
| Type of craftwork engaged | ||||
| Weaving | 114 (54.5%) | 81 (51.6%) | 33 (63.5%) | p=0.156 |
| Tailoring and sewing | 66 (31.6%) | 51 (32.5%) | 15 (28.8%) | |
| Pottery | 10 (4.8%) | 7 (4.5%) | 3 (5.8%) | |
| Producing oil and making soaps | 19 (9.1%) | 18 (11.5%) | 1 (1.9%) | |
| Years working as craftswomen | ||||
| 10 years and lesser | 139 (66.8%) | 106 (67.9%) | 33 (63.5%) | p=0.078 |
| >10 years | 69 (33.2%) | 50 (32.1%) | 19 (36.5%) | |
| Missing=1 | ||||
| Marital status | ||||
| Single | 3 (1.4%) | 2 (1.3%) | 1 (1.9%) | p=0.685 |
| Married | 158 (75.6%) | 117 (74.5%) | 41 (78.8%) | |
| Widowed | 27 (12.9%) | 20 (12.7%) | 7 (13.5%) | |
| Separated/divorced | 21 (10.0%) | 18 (11.5%) | 3 (5.8%) | |
| Number of children | ||||
| None | 4 (1.9%) | 4 (2.5%) | 0 (0.0%) | p=0.291 |
| 1–4 | 59 (28.2%) | 47 (29.9%) | 12 (23.1%) | |
| 5 or more | 146 (69.9%) | 106 (67.5%) | 40 (76.9%) | |
| Number of dependents | ||||
| None | 13 (6.2%) | 8 (5.1%) | 5 (9.6%) | p=0.215 |
| 1–4 | 113 (54.1%) | 82 (52.2%) | 31 (59.6%) | |
| 5 or more | 83 (39.7%) | 67 (42.7%) | 16 (30.8%) | |
| Prescription of near vision spectacles | ||||
| +1.00D to+1.75D | 58 (27.8%) | 46 (29.3%) | 12 (23.1%) | p=0.683 |
| +2.00D to+2.75D | 101 (48.3%) | 74 (47.1%) | 27 (51.9%) | |
| >+2.75D | 50 (23.9%) | 37 (23.6%) | 13 (25.0%) | |