Table 4.
Effect size statistic calculated for AS-20 and VFQ-25 in adults undergoing strabismus surgery.
| Effect size: Effect size (Mean change / Pre-op standard deviation) | ||||||
|---|---|---|---|---|---|---|
| Diplopia (n=80) | No diplopia (n=26) | |||||
| AS-20 questionnaire | Success (n=46) | Partial success (n=27) | Failure (n=7) | Success (n=19) | Partial success (n=5) | Failure (n=2) |
| AS-20 composite score | 1.27 (25.3/19.8) | 0.88 (17.5/19.9) | 0.47 (8.0/17.1) | 1.43 (21.8/15.3) | 0.99 (12.9/13.1) | −0.18 (−3.1/17.7) |
| Psychosocial subscale | 0.67 (17.3/25.5) | 0.48 (11.3/23.6) | 0.20 (5.0/25.2) | 1.44 (30.0/20.9) | 0.59 (16.4/27.7) | 0.28 (2.5/8.8) |
| Function subscale | 1.56 (33.3/21.3) | 1.02 (21.0/20.6) | 0.64 (11.1/17.2 | 0.70 (13.7/19.6) | 0.61 (9.5/15.5) | −0.20 (−8.8/44.2) |
| VFQ-25 questionnaire | ||||||
| VFQ-25 composite score | 1.14 (20.5/18.0) | 0.69 (11.9/17.2) | 0.54 (8.4/15.7) | 0.57 (6.6/11.6) | 0.41 (1.7/4.1) | −3.33 (−15.4/4.6) |
| General health | 0.09 (2.2/23.2) | −0.04 (−0.9/26.3) | 0.00 (0.0/23.8) | 0.22 (5.3/24.0) | 0.37 (5.0/13.7) | 0.35 (25.0/70.7) |
| General vision | 1.13 (23.5/20.8) | 0.69 (12.6/18.3) | 0.53 (11.4/21.4) | 0.48 (7.4/15.4) | NA (12.0/0.0) | 0.0 (0.0/14.1) |
| Ocular pain | 0.68 (15.5/22.7) | 0.28 (6.5/23.2) | 0.11 (1.8/16.8) | 0.22 (5.3/23.8) | 0.0 (0.0/14.3) | −2.12 (−18.8/8.8) |
| Near activities | 1.10 (23.7/21.5) | 0.61 (15.7/25.8) | 0.57 (10.1/17.6) | 0.36 (5.3/14.5) | 0.0 (0.0/4.2) | −0.71 (−16.7/23.6) |
| Distance activities | 1.06 (21.6/20.4) | 0.51 (12.8/25.3) | 0.23 (4.8/20.8) | 0.53 (8.8/16.4) | −0.67 (−5.0/7.5) | −0.24 (−4.2/17.7) |
| Vision specific social functioning | 0.72 (14.9/20.7) | 0.41 (7.9/19.2) | 0.77 (10.7/13.9) | 0.66 (10.5/15.9) | NA (0.0/0.0) | NA (−25.0/0.0) |
| Vision specific mental health | 1.18 (34.0/28.7) | 0.96 (22.2/23.2) | 0.04 (0.9/20.5) | 0.76 (14.5/19.1) | −0.80 (−5.0/6.3) | −0.80 (−17.7/22.1) |
| Vision specific role difficulties | 0.97 (29.9/30.9) | 0.58 (15.9/27.2) | 0.56 (16.1/28.6) | 0.32 (5.9/18.3) | 0.45 (5.0/11.2) | NA (−37.5/0.0) |
| Vision specific dependency | 0.64 (17.4/27.0) | 0.60 (13.3/21.9) | 0.18 (4.2/22.6) | 0.29 (5.3/18.4) | 0.45 (1.7/3.7) | NA (−16.7/0.0) |
| Driving | 0.62 (18.7/30.2) | 0.46 (10.3/22.3) | 0.31 (6.9/22.6) | 0.18 (3.9/22.0) | −0.15 (−1.7/10.9) | NA (−8.3/0.0) |
| Color vision | 0.31 (4.9/16.0) | 0.08 (1.0/11.8) | 0.80 (10.7/13.4) | 0.23 (1.3/5.7) | NA (0.0/0.0) | NA (−12.5/0.0) |
| Peripheral vision | 0.80 (21.2/26.6) | 0.46 (12.0/26.3) | 0.62 (21.4/34.5) | 0.18 (3.9/22.1) | 0.45 (10.0/22.4) | −0.71 (−12.5/17.7) |
Effect size is calculated by dividing mean pre- to post-operative change by pre-operative standard deviation. A higher effect size statistic indicates a more responsive measure. Results are shown for patients with and without diplopia, by success, partial success and failure. NA = not applicable / unable to calculate. AS-20 = Adult Strabismus-20; VFQ-25 = National Eye Institute Visual Function Questionnaire-25