Table 1.
Characteristics of the cognitively normal and the MCI groups who completed on-road assessments
| Variable | Cognitively Normal | MCI | p-value |
| (n = 245) | (n = 57) | ||
| Age | 75.68 (6.12) | 75.42 (6.31) | 0.71 |
| Education | 15.76 (3.95) | 15.15 (4.11) | 0.25 |
| MMSE | 28.86 (1.37) | 28.89 (1.25) | 0.70 |
| Female | 98 (40.8%) | 23 (40.4%) | 0.94 |
| Marital status | 0.40 | ||
| Married | 152 (63.6%) | 35 (62.5%) | |
| Widowed | 49 (20.4%) | 9 (16.1%) | |
| Never married | 14 (5.8%) | 2 (3.6%) | |
| Separated/divorced | 25 (10.4%) | 10 (17.9%) | |
| SF12 Physical health | 41.39 (9.44) | 43.58 (9.11) | 0.15 |
| SF12 Mental health | 55.91 (7.96) | 55.46 (8.24) | 0.52 |
| MAC-Q (subjective memory concerns) | 24.80 (4.27) | 27.54 (2.52) | <0.001 |
| Driving experience (y) | 56.28 (7.01) | 54.70 (8.11) | 0.16 |
| Days driven per week | 5.66 (1.51) | 5.33 (1.95) | 0.021 |
| Distance driven per week (km) | 196.74 (218.34) | 162.38 (186.63) | 0.31 |
MMSE, Mini-Mental State Examination; SF12, 12-Item Short Form Survey; MAC-Q, Assessment of Memory Complaints Questionnaire; MCI, mild cognitive impairment.