Table 4.
Crude and adjusted odds of having poor driving competencies (N = 404)
| Determinants | Crude | Model 1-TMT-A | Model 2-TMT-B | |||
|---|---|---|---|---|---|---|
| R2 = 0.081 | R2 = 0.107 | |||||
| OR [CI95%, p-value] | R2 | ORadj | P-value | ORadj | P-value | |
| Neuropsychological tasks | ||||||
| TMT-A* | 5.1 [1.5 to 17.4, p = 0.010] | 0.036 | 3.8 | 0.041 | - | - |
| TMT-B* | 7.6 [2.2 to 25.8, p = 0.001] | 0.058 | - | - | 6.3 | 0.005 |
| MoCA | 0.043 | |||||
| NoCI (MoCA ≥ 26) | Reference | |||||
| MCI (MoCA < 26 & ≥19) | 0.60 [0.20 to 1.8, p = 0.368] | |||||
| SCI (MoCA < 19) | 16.7 [2.2 to 127, p = 0.006] | |||||
| MoCAmod*† | 4.4 [1.4 to 13.7, p = 0.010] | 0.034 | - | - | ||
| Socio-demographic | ||||||
| Age* | 1.6 [0.43 to 6.0, p = 0.468] | 0.003 | 0.85 | 0.821 | 0.83 | 0.797 |
| Gender (female) | 2.1 [0.88 to 5.0 p = 0.093] | 0.016 | - | - | - | - |
| Education (<12 yrs) | 0.81 [0.3 to 2.3, p = 0.701] | <0.001 | - | - | 0.59 | 0.349 |
| Functional mobility | ||||||
| Timed up-and-go test (TUG) | 3.2 [0.9 to 11.1, p = 0.066] | 0.020 | 2.4 | 0.178 | 2.2 | 0.210 |
| Driving experience | ||||||
| Distance driven per week*† | 5.4 [1.6 to 17.4, p = 0.004] | 0.043 | 4.1 | 0.022 | 3.9 | 0.031 |
| Vision | ||||||
| Visual acuity*† | 1.5 [0.44 to 5.3, p = 0.514] | 0.002 | - | - | ||
*Odds ratio was measured using logistic regression. Continuous values were transformed to be normally distributed and have a range of 0 to 1 from the fifth to the ninety-fifth percentile of the population. † Scale was inverted for high scores to represent worsening conditions. We used multiple imputations (50) to replace missing data (TUG, n = 10; distance per week, n = 2; visual acuity, n = 3). MCI = mild cognitive impairment; MoCA = Montreal Cognitive Assessment, MoCAmod = Modified Montreal Cognitive Assessment (First subtask similar to TMT-B omitted), NoCI = No cognitive impairement; R2 = McFadden's pseudo R-squared coefficient of determination; SCI = severe cognitive impairment.