| Variables | Median (IQR**) | Frequency | Weighted percentages |
| Age (years) (n = 426) | 38 (32 - 45) |
|
|
| Gender (n = 430) |
|
|
|
| Male |
| 430 | 100 |
| Marital status (n = 428) |
|
|
|
| Married or living in a couple |
| 395 | 92.29 |
| Single or living alone |
| 33 | 7.71 |
| Level of education (n = 428) |
|
|
|
| None |
| 135 | 31.37 |
| Primary or higher |
| 293 | 68.63 |
| Type of driver (n = 428) |
|
|
|
| Occasional |
| 96 | 22.71 |
| Regular |
| 332 | 77.29 |
| Daily income (USD) (n = 401) |
|
|
|
| Less than 8.9 |
| 363 | 90.56 |
| 8.9 and more |
| 38 | 9.44 |
| Number of years of riding (n = 428) |
|
|
|
| 0 - 10 |
| 303 | 70.62 |
| 11 or more |
| 125 | 29.38 |
| RC history (n = 424) |
| 126 | 30.27 |
| Yes |
| 298 | 69.73 |
| No |
|
|
|
| Alcohol daily consumption (n = 421) |
|
|
|
| Yes |
| 128 | 30.41 |
| No |
| 293 | 69.59 |
| Tobacco daily consumption (n = 423) |
|
|
|
| Yes |
| 17 | 4.03 |
| No |
| 406 | 95.97 |
| Tramadol daily consumption (n = 420) |
|
|
|
| Yes |
| 121 | 28.50 |
| No |
| 299 | 71.50 |