Construct validity of the Chinese version of the National Eye Institute Visual Function Questionnaire (CHI-VFQ-25) in group A and group B patients in different age groups
| Group A | Group B | p Value* | |||||||||
| <50 | 50–59 | 60–69 | 70–79 | ⩾80 | <50 | 50–59 | 60–69 | 70–79 | ⩾80 | ||
| General Health | 42.5 (7.1) | 40.8 (15.0) | 40.1 (11.8) | 42.2 (19.7) | 42.7 (16.1) | 51.7 (18.2) | 50.6 (17.3) | 45.2 (14.0) | 42.5 (18.6) | 37.5 (26.5) | 0.277 |
| General Vision | 45.0 (0.0) | 48.0 (21.1) | 40.8 (11.0) | 46.8 (14.4) | 47.4 (14.5) | 65.7 (13.4) | 64.6 (14.4) | 56.3 (11.1) | 56.5 (13.5) | 55.0 (7.1) | 0.001 |
| Ocular Pain | 81.3 (26.5) | 67.5 (23.7) | 69.4 (28.8) | 74.4 (24.0) | 82.8 (21.3) | 79.3 (18.7) | 83.2 (19.9) | 76.3 (21.1) | 72.1 (26.5) | 90.0 (10.5) | 0.269 |
| Near Activities | 68.8 (26.5) | 57.3 (25.4) | 52.6 (23.1) | 60.2 (24.4) | 58.5 (25.0) | 86.6 (15.9) | 77.3 (14.5) | 76.6 (18.7) | 70.5 (18.2) | 70.8 (22.1) | 0.001 |
| Distance Activities | 62.5 (35.4) | 65.6 (22.9) | 60.4 (22.1) | 65.9 (19.4) | 62.2 (26.1) | 89.0 (13.0) | 85.8 (15.1) | 84.6 (15.8) | 75.3 (19.7) | 85.3 (18.2) | 0.001 |
| Social Functioning | 83.3 (23.6) | 70.0 (23.0) | 66.2 (25.4) | 72.3 (24.2) | 73.0 (27.0) | 94.8 (12.3) | 93.8 (14.8) | 92.1 (13.0) | 89.6 (14.2) | 93.3 (14.9) | 0.001 |
| Mental Health | 87.5 (17.7) | 61.0 (32.1) | 55.8 (24.3) | 64.1 (26.4) | 60.4 (28.6) | 82.8 (13.7) | 83.3 (14.5) | 78.8 (21.8) | 66.9 (29.6) | 73.0 (29.7) | 0.024 |
| Role Difficulties | 71.9 (13.3) | 71.3 (20.0) | 57.6 (27.8) | 61.1 (22.5) | 53.9 (27.9) | 82.3 (14.2) | 83.9 (17.2) | 77.1 (17.1) | 65.4 (19.2) | 81.3 (13.3) | 0.001 |
| Dependency | 100.0 (0.0) | 70.0 (26.5) | 66.7 (26.3) | 57.1 (25.5) | 51.4 (29.1) | 96.1 (7.7) | 94.8 (13.3) | 87.3 (17.0) | 70.2 (28.6) | 82.5 (22.3) | 0.001 |
| Colour Vision | 100.0 (0.0) | 95.0 (10.5) | 88.9 (23.0) | 94.0 (17.7) | 92.6 (21.1) | 100.0 (0.0) | 97.1 (8.1) | 99.2 (4.6) | 93.3 (16.7) | 100.0 (0.0) | 0.210 |
| Peripheral Vision | 100.0 (0.0) | 72.5 (24.9) | 79.2 (24.6) | 79.7 (24.5) | 74.3 (28.1) | 94.8 (14.0) | 87.9 (17.5) | 86.7 (19.4) | 86.5 (21.5) | 85.0 (22.4) | 0.121 |
| Composite | 80.0 (14.3) | 67.8 (18.3) | 63.8 (16.1) | 67.6 (15.1) | 65.5 (18.3) | 87.2 (8.8) | 85.2 (11.0) | 81.5 (11.1) | 74.6 (14.3) | 81.6 (8.4) | 0.001 |
Composite is the average subscale scores excluding the general health subscale. The Driving subscale was omitted, as there were too few cases for analysis.
*Probabilities are from univariate analysis of variance contrasting group A and group B patients in different age groups.