Table 2.
Scores for each subscale and total scale of the comprehension questionnaire, HADS and NEI VFQ-25 in all subjects
| Subscale | N | Mean | SD | Range | Rank |
|---|---|---|---|---|---|
| Comprehension questionnaire | |||||
| Knowledge of glaucoma | 500 | 7.30 | 3.27 | 0–12 | 2 |
| Compliance | 500 | 9.21 | 2.10 | 2–12 | 1 |
| Habits | 500 | 4.79 | 1.48 | 0–7 | 3 |
| Total comprehension | 500 | 21.30 | 5.78 | 6–31 | – |
| HADS questionnaire | |||||
| HADS-A | 500 | 6.12 | 3.64 | 0–18 | 2 |
| HADS-D | 500 | 7.29 | 4.18 | 0–18 | 1 |
| HADS | 500 | 13.41 | 6.59 | 0–32 | – |
| NEI VFQ-25 questionnaire | |||||
| General health | 500 | 66.58 | 15.48 | 0–100 | 7 |
| General vision | 500 | 52.41 | 18.80 | 0–100 | 11 |
| Ocular pain | 500 | 66.58 | 18.59 | 12.5–100 | 7 |
| Near activity | 500 | 70.80 | 26.57 | 0–100 | 5 |
| Distance activity | 500 | 72.40 | 26.15 | 0–100 | 4 |
| Social function | 500 | 86.75 | 19.82 | 0–100 | 2 |
| Mental health | 500 | 64.46 | 19.97 | 6.25–100 | 9 |
| Role difficulties | 500 | 54.63 | 25.00 | 0–100 | 10 |
| Dependency | 500 | 68.95 | 24.78 | 0–100 | 6 |
| Driving | 150 | 20.01 | 34.46 | 0–100 | 12 |
| Colour vision | 500 | 87.60 | 22.96 | 0–100 | 1 |
| Peripheral vision | 500 | 84.55 | 19.83 | 0–100 | 3 |
| Composite score | 500 | 70.60 | 15.38 | 16.40–97.16 | – |
HADS, Hospital Anxiety and Depression Scale; HADS-A, Hospital Anxiety and Depression Scale-Anxiety; HADS-D, Hospital Anxiety and Depression Scale-Depression; NEI VFQ-25, 25-item National Eye Institute Visual Function Questionnaire.