Table 2 Distribution of scale scores
Questionnaire and Domain | Question number(s) | Baseline (week 0) N = 235 | Follow-up (week 54) N = 197 | ||
|---|---|---|---|---|---|
|  |  | Mean ± SD | Median (IQR) | Mean ± SD | Median (IQR) |
VFQ-25: Empirical range is 0 to 100 where a higher score indicates better HRQoL | Â | Â | Â | Â | Â |
1. General Health | 1 | 40.2 ± 22.2 | 50.0 (25.0-50.0) | 40.9 ± 21.0 | 50.0 (25.0-50.0) |
2. General Vision | 2 | 54.6 ± 17.8 | 60.0 (40.0-60.0) | 62.2 ± 15.4 | 60.0 (60.0-80.0) |
3. Ocular Pain | 4, 19 | 78.8 ± 22.3 | 87.5 (62.5-100.0) | 82.2 ± 19.7 | 87.5 (62.5-100.0) |
4. Near Activities | 5, 6, 7 | 58.6 ± 23.8 | 58.3 (33.3-75.0) | 61.0 ± 23.9 | 58.3 (41.7-83.3) |
5. Distance Activities | 8, 9, 14 | 64.2 ± 24.4 | 66.7 (41.7-83.3) | 66.1 ± 25.6 | 66.7 (50.0-91.7) |
6. Social Functioning | 11, 13 | 80.1 ± 23.1 | 87.5 (62.5-100.0) | 78.6 ± 23.2 | 87.5 (62.5-100.0) |
7. Mental Health | 3, 21, 22, 25 | 58.2 ± 27.7 | 62.5 (37.5-81.3) | 64.2 ± 25.2 | 68.8 (50.0-87.5) |
8. Role Difficulties | 17, 18 | 54.8 ± 28.0 | 50.0 (37.5-75.0) | 61.7 ± 27.8 | 62.5 (37.5-87.5) |
9. Dependence | 20, 23, 24 | 70.1 ± 31.2 | 83.3 (41.7-100.0) | 73.7 ± 28.2 | 83.3 (58.3-100.0) |
10. Driving* | 15c, 16, 16a | 51.8 ± 34.9 | 58.3 (16.7-83.3) | 53.9 ± 35.6 | 66.7 (16.7-83.3) |
11. Colour Vision | 12 | 87.1 ± 21.2 | 100.0 (75.0-100.0) | 87.2 ± 21.5 | 100.0 (75.0-100.0) |
12. Peripheral Vision | 10 | 71.3 ± 25.8 | 75.0 (50.0-100.0) | 74.6 ± 25.4 | 75.0 (50.0-100.0) |
VFQ-25 Composite | 1-14, 15c, 16, 16a, 17-25 | 66.8 ± 18.6 | 68.8 (53.5-82.8) | 70.1 ± 18.7 | 71.5 (57.2-86.6) |
EQ-5D VAS: Empirical range is 0 to 100 where a higher score indicates better health |  | 65.7 ± 16.8 | 70 (50-80) | 67.3 ± 17.0 | 70 (60-80) |
EQ-5D single index |  | 0.748 ± 0.203 | 0.779 (0.689-0.848) | 0.727 ± 0.238 | 0.727 (0.689-0.850) |