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 |
|
|
|
|
|
| 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) | |
Note: Direct comparison between baseline and follow-up data should not be made because the baseline cohort was not restricted to those who also have follow-up data.
* Some patients are no longer currently driving, leading to higher amount of missingness in this subscale: N = 151 at baseline and N = 122 at week 54.