Table 2. Risk of trichiasis recurrence and severity, subdivided by baseline severity.
| Baseline TT Severity | ||||||
| Minor TT | Major TT | Total | ||||
| a) Number of Incident Recurrence Cases at each time-point (months) | ||||||
| 6 | 52/615 | (8.5%) | 120/587 | (20.4%) | 172/1202 | (14.3%) |
| 12 | 23/622 | (3.7%) | 37/612 | (6.1%) | 60/1234 | (4.9%) |
| 18 | 22/620 | (3.6%) | 34/622 | (5.5%) | 56/1242 | (4.5%) |
| 24 | 11/614 | (1.8%) | 16/619 | (2.6%) | 27/1233 | (2.2%) |
| Total | 108/641 * | (16.9%) | 207/635 * | (32.6%) | 315/1276 * | (24.7%) |
| b) Recurrence severity | ||||||
| None | 533 | (83.2%) | 428 | (67.4%) | 961 | (75.3%) |
| Minor | 104 | (16.2%) | 169 | (26.6%) | 273 | (21.4%) |
| Major (at 1 or more follow-ups) | 4 | (0.6%) | 38 | (6.0%) | 42 | (3.3%) |
| Total | 641 | 635 | 1276 | |||
| c) Recurrence risks by eye | ||||||
| Right | 49/314 | (15.6%) | 102/316 | (32.3%) | 151/630 | (24.0%) |
| Left | 59/327 | (18.0%) | 105/319 | (32.9%) | 164/646 | (25.4%) |
| Total | 108 | 207 | 315 | |||
| d) Change in lash burden between baseline and 24 months in participants with recurrence | ||||||
| >5 more lashes at 24 m | 0 | (0.0%) | 2 | (1.0%) | 2 | (0.7%) |
| 1–5 more lashes at 24 m | 2 | (1.9%) | 12 | (6.1%) | 14 | (4.6%) |
| Same number lashes at 24 m | 26 | (24.3%) | 35 | (17.7%) | 61 | (20.0%) |
| 1–5 fewer lashes at 24 m | 79 | (73.8%) | 66 | (33.3%) | 145 | (47.5%) |
| 6–20 fewer lashes at 24 m | 0 | (0.0%) | 69 | (34.9%) | 69 | (22.6%) |
| >20 fewer lashes at 24 m | 0 | (0.0%) | 14 | (7.1%) | 14 | (4.6) |
| Total | 107 | (100%) | 198 | (100%) | 305 | (100%) |
| e) Recurrence risks by baseline lash type | ||||||
| No lashes (epilating) | 11/123 | (8.9%) | 34/101 | (33.7%) | 45/224 | (20.1%) |
| Metaplastic lashes only | 54/293 | (18.4%) | 64/200 | (32.0%) | 118/493 | (23.9%) |
| Misdirected lashes only | 27/164 | (16.5%) | 16/83 | (19.3%) | 43/247 | (17.4%) |
| Aberrant lashes† | 15/58 | (25.9%) | 14/65 | (21.5%) | 29/123 | (23.6%) |
| Entropic +/− aberrant lashes | 1/3 | (33.3%) | 79/186 | (42.5%) | 80/189 | (42.3%) |
*
Number of individuals seen on at least one follow-up.
†
Aberrant lashes = either metaplastic or misdirected.
(a) Incident recurrence at each time-point. (b) Severity of the recurrence. (c) Recurrence rates by eye. (d) Change in the number of lashes between baseline and 24 months. (e) Recurrence by type of lash at baseline.