Table 2.
Gender adjusted rate ratios (RRs) and 95% confidence intervals (CIs) comparing motor vehicle collision (MVC) rates between drivers hemianopic or quadrantanopic field loss and age-matched drivers with normal visual fields.
| Participants with Field Loss N = 27 | Participants with Normal Fields N = 27 | |||
|---|---|---|---|---|
| Hemianopia N = 20 | Quadrantanopia N = 7 | Combined N = 27 | ||
| Motor vehicle collisions | ||||
| All | 15 | 4 | 19 | 21 |
| At-fault | 10 | 2 | 12 | 10 |
| Person-years | 134.6 | 45.8 | 180.4 | 238.4 |
| All MVC RR (95% CI) | 1.61 (0.65-3.96) | 0.37 (0.08–1.70) | 1.10 (0.51–2.36) | --- |
| At-fault MVC RR (95% CI) | 3.13 (0.78–12.46) | 0.83 (0.04–17.72) | 2.50 (0.76–8.21) | --- |
| Person-miles | 1,098,917 | 419,296 | 1,518,213 | 3,678,181 |
| All MVC RR (95% CI) | 2.43 (1.05–5.62) | 0.87 (0.20–3.73) | 2.45 (0.89–3.95) | --- |
| At-fault MVC RR (95% CI) | 2.69 (1.00–7.30) | 2.31 (0.17–31.22) | 2.64 (1.03–6.80) | --- |