From: Sleep deficiency and motor vehicle crash risk in the general population: a prospective cohort study
Characteristic | No MVC (n = 2979)* | MVC (n = 222)†| P value |
---|---|---|---|
Age – years | 62.3 (10.1) | 61.5 (10.8) | 0.22 |
Male sex – no. (%) | 1610 (54.0) | 135 (60.8) | 0.06 |
Body mass index – kg/m2 | 28.2 (4.9) | 28.6 (5.6) | 0.31 |
Comorbid illness – no. (%) |  |  |  |
 Diabetes mellitus | 192 (6.7) | 15 (7.3) | 0.66 |
 Hypertension | 1174 (39.4) | 83 (37.4) | 0.57 |
 Myocardial infarction | 186 (6.3) | 11 (5.0) | 0.34 |
 Stroke | 73 (2.5) | 5 (2.3) | 0.65 |
Smoking status – no. (%) |  |  | 0.96 |
 Current | 297 (10.0) | 21 (9.5) |  |
 Former | 1367 (46.1) | 103 (46.4) |  |
Alcohol consumption – drinks per week | 1 (0, 4) | 0 (0, 3) | 0.88 |
Caffeine consumption – drinks per day | 2 (1, 4) | 2 (1, 4) | 0.76 |
Sleeping pill use – no. (%) | 1989 (6.7) | 19 (8.6) | 0.27 |
Epworth Sleepiness Scale score | 7.7 (4.3) | 8.6 (4.7) | < 0.01 |
Apnea-hypopnea index – events per hour | 4.3 (1.3, 10.9) | 5.5 (1.3, 13.7) | < 0.01 |
Usual sleep duration – hours per night | 7.1 (1.1) | 6.9 (1.1) | 0.02 |
Miles driven per year – thousands | 9.0 (4.0, 14.0) | 11.5 (7.0, 15.0) | < 0.001 |