Table 2.
Characteristics of older home-dwelling drivers (Study 3: n = 182).
| % (n) | |
|---|---|
| Age (years) | |
| 67–69 years | 1.6% (3) |
| 70–74 years | 48.4% (88) |
| 75–79 years | 29.1% (53) |
| 80–84 years | 15.9% (29) |
| ≥85 years | 5.0% (9) |
| Gender (% male) | 66.5% (121) |
| Education (% <12 years) | 34.6% (63) |
| VISION | |
| Visual acuity (Snellen chart) | |
| <0.6 dec | 1.7% (3) |
| 0.6–1.0 dec | 53.9% (98) |
| >1.0 dec | 43.4% (79) |
| Visual field (<140°) | 0.6% (1) |
| Contrast sensitivity (MARS)† | |
| ≤1.64 logCS | 8.2% (15) |
| 1.68–1.72 logCS | 47.2% (86) |
| ≥1.76 logCS | 37.4% (68) |
| FUNCTIONAL MOBILITY | |
| Timed up-and-go task > 12 s | 8.2% (15) |
| COGNITIVE STATE | |
| MoCA (points [0–30]) | |
| 0–18 points | 0.5% (1) |
| 19–25 points | 29.1% (53) |
| 26–28 points | 42.9% (78) |
| 29–30 points | 27.5% (50) |
| DRIVING | |
| Distance driven per week (km) | |
| ≥200 km | 51.6% (94) |
| 100–199 km | 38.5% (70) |
| 50–99 km | 8.2% (15) |
| <50 km | 1.7% (3) |
| History of accidents (previous 2 years) | |
| All types with material damage | 26.4% (48) |
| Responsible for damage to other(s) | 4.9% (9) |
| Injured | 1.1% (2) |
| On-road driving performance† | |
| Excellent | 44.5% (81) |
| Good | 33.5% (61) |
| Moderate | 15.4% (28) |
| Poor | 4.5% (12) |
| Driving self-restriction score [0–20] | |
| None | 34.6% (63) |
| 1–3 | 43.4% (79) |
| 4− | 15.9% (29) |
| >6 | 6.1% (11) |
*MARS was introduced after the eleventh participant had been included.
†
On-road performance was imputed for 8 drivers. CS, contrast sensitivity; MARS, mars contrast sensitivity test; MoCA, Montreal cognitive assessment.