Table 5.
Driving history by age groupa
| Driving History | Age 18–39 Young Age N=43 |
Age 40–59 Middle Age N=64 |
Age ≥60 Old Age N=67 |
P value |
|---|---|---|---|---|
| Miles/day, median (IQR) b | 20.0 (10.0, 50.0) | 25.0 (15.0, 50.0) | 20.0 (10.0, 40.0) | .451 g |
| Overall driver self-rating, median (IQR) c | 90.0 (80.0, 95.0) | 90.0 (80.0, 95.0) | 90.0 (80.0, 95.0) | .965 g |
| Night-time driver self-rating, median (IQR) d | 90.0 (80.0,99.0) | 90.0 (75.0, 100.0) | 85.0 (75.0, 95.0) | .427 g |
| Adverse driving event, No. (%) e | 30 (69.8) | 30 (46.9) | 31 (46.3) | .026 h |
| Adverse drowsy driving event, No. (%) f | 8 (18.6) | 4 (6.3) | 5 (7.5) | .096 i |
Abbreviations: ESS, Epworth Sleepiness Scale; IQR, interquartile range (25th, 75th percentiles); ISI, Insomnia Severity Index.
Only included those individuals who drove at least once a week (n=174).
Based on response to: How many miles do you drive in a typical day?
Based on response to: How would you currently rate yourself as a driver? Visual analogue scale from 0–100 (0 meaning poor and 100 meaning excellent).
Based on response to: How confident are you driving at night? Within the context of the past month, using a visual analogue scale from 0–100 (0 meaning ‘Not at all confident’ and 100 meaning ‘Completely confident’).
Based on self-report and included at least one of the following in the past year: crash, near-crash, or getting lost.
Yes response to: In the past year, have you had any car accident or near misses (almost accidents) because you were sleepy or drowsy while driving?
Kruskal-Wallis Test.
Mantel-Haenszel Chi-Square Test.
Fisher’s Exact Test.