| Infantile ET | Accommodative ET | p | Fully accommodative ET | Partially accommodative ET | P | Acquired non-accommodative ET | Secondary ET | |
| Number (% all ET) | 45 (23%) | 101 (53%) | 57 (30%) | 44 (23%) | 32 (17%) | 12 (6%) | ||
| Age of presentation, yr (SD) (range) | 2.8 (3.1) (0.2–15.2) | 4.4 (2.5) (0.4–13.1) | <0.001 | 4.5 (2.8) (0.4–13.1) | 4.3 (2.0) (0.4–11.0) | 0.64 | 4.6 (2.4) (0.7–12.0) | 5.8 (4.3) (0.6–13.1) |
| Estimated age of onset | ||||||||
| 0 to 2 years | 45 (100%) | 34 (33%) | 20 (35%) | 14 (32%) | 17 (53%) | 6 (50%) | ||
| 3 to 5 years | — | 55 (55%) | 31 (54%) | 24 (54%) | 12 (37%) | 4 (33%) | ||
| 6 to 12 years | — | 12 (12%) | <0.001 | 6 (10%) | 6 (14%) | 0.86 | 3 (10%) | 2 (17%) |
| Distant strabismus (PD)* (SD) (range) | 34.0 (18.1) (8–103) | 17.7 (14.8) (0–59) | <0.001 | 13.2 (13.7) (0–59) | 25.3 (14.2) (0–55) | <0.001 | 32.3 (16.0) (2–80) | 35.0 (16.2) (8–72) |
| Near strabismus (PD)* (SD) (range) | 35.0 (19.2) (10–113) | 25.8 (12.3) (2–59) | <0.001 | 23.0 (12.3) (2–59) | 29.7 (11.2) (8–55) | <0.01 | 35.4 (15.3) (14–80) | 36.7 (15.6) (14–72) |
| Presence of | ||||||||
| Distant stereoacuity | 0/3 (0%) | 4/9 (44%) | 0.15 | 4/7 (57%) | 0/2 (0%) | 0.15 | NA | NA |
| Near stereoacuity | 0/13 (0%) | 12/56 (20%) | 0.06 | 12/32 (36%) | 0/24 (0%) | <0.001 | ||
| Spherical equivalent (D) (SD) | 0.78 (3.45) | 2.75 (2.67) | <0.001 | 2.4 (2.7) | 3.1 (2.5) | 0.21 | 1.8 (1.7) | 2.0 (2.0) |
| Anisometropia ⩾1 D | 6/36 (16%) | 23/92 (25%) | 0.31 | 12/49 (24%) | 11/43 (25%) | 0.90 | 11/32 (34%) | 7/12 (41%) |
| Astigmatism ⩾1.5 D | 8/36 (22%) | 19/92 (20%) | 0.84 | 6/49 (12%) | 13/43 (30%) | 0.02 | 6/32 (18%) | 0/12 (0%) |
| Amblyopia/ preference | 23 (51%) | 43 (42%) | 0.35 | 21 (37%) | 22 (50%) | 0.18 | 17 (53%) | 7 (58%) |
| A/V pattern or DVD | 8 (17%) | 18 (17%) | 0.51 | 7 (12%) | 12 (27%) | 0.08 | 4 (12%) | 0 (0%) |
*Measurement taken from first formal orthoptic assessment (usually during first or second visit). If spectacles were prescribed during these visits, the measurement performed after at least 6 weeks of spectacle wear was taken.