Table 2.
Comparison of drivers and non-drivers by clinical and self-reported visual function variables at baseline (6 months) and 54 month follow-up
| 6 Month | 54 Month | |||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| Continuous Variables | Driver (n=471) | Non-Driver (n=84) | Unadjusted P-value* | Adjusted P-value† | Driver (n=429) | Non-Driver (n=81) | Unadjusted P-value* | Adjusted P-value† |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |||||
| Mean Deviation | ||||||||
| Better Eye | −2.1 (2.7) | −2.9 (3.0) | 0.014 | 0.966 | −1.9 (3.1) | −3.5 (3.7) | <0.001 | 0.007 |
| Worse Eye | −5.7 (4.9) | −5.9 (4.0) | 0.613 | 0.429 | −5.4 (5.2) | −7.0 (4.9) | 0.012 | 0.080 |
| Visual Acuity | ||||||||
| Better Eye | 87.7 (4.9) | 85.1 (5.4) | <0.001 | 0.012 | 86.9 (5.7) | 83.2 (6.9) | <0.001 | 0.003 |
| Worse Eye | 83.2 (7.5) | 79.7 (11.0) | 0.007 | 0.095 | 81.5 (10.6) | 75.3 (14.4) | 0.001 | 0.003 |
| Visual Activities Questionnaire | ||||||||
| Total Score | 1.9 (0.7) | 2.2 (0.8) | 0.003 | 0.647 | 1.9 (0.7) | 2.1 (0.9) | 0.025 | 0.458 |
| Color Discrimination | 1.5 (0.8) | 1.7 (0.9) | 0.047 | 0.368 | 1.5 (0.8) | 1.8 (1.0) | 0.008 | 0.134 |
| Glare Disability | 2.4 (1.0) | 2.4 (1.1) | 0.660 | 0.228 | 2.3 (1.1) | 2.2 (1.2) | 0.186 | 0.073 |
| Light/Dark Adaptation | 2.3 (1.0) | 2.5 (1.1) | 0.074 | 0.940 | 2.3 (1.1) | 2.5 (1.2) | 0.254 | 0.640 |
| Acuity/Spatial Vision | 2.4 (1.0) | 2.8 (1.2) | 0.008 | 0.374 | 2.2 (1.0) | 2.6 (1.1) | 0.008 | 0.458 |
| Depth Perception | 1.5 (0.7) | 1.8 (0.9) | 0.001 | 0.124 | 1.5 (0.7) | 1.8 (0.9) | 0.005 | 0.170 |
| Peripheral Vision | 1.7 (0.8) | 1.9 (0.9) | 0.014 | 0.902 | 1.7 (0.8) | 1.9 (0.9) | 0.019 | 0.471 |
| Visual Search | 2.0 (0.9) | 2.2 (0.9) | 0.040 | 0.903 | 1.9 (0.9) | 2.2 (1.1) | 0.052 | 0.467 |
| Visual Processing Speed | 1.8 (0.7) | 2.2 (0.9) | 0.001 | 0.164 | 1.7 (0.8) | 2.1 (1.0) | 0.008 | 0.521 |
*
t-test for unequal variance was used where applicable