Distribution of demographic features and occupational factors of 1242 participants in the Taxi Drivers’ Health Study (TDHS)
| Characteristics | TDHS participants | Drivers not in selected hospital* | Reference† | ||
|---|---|---|---|---|---|
| N1‡ | Mean (SD) or % | N2‡ | Mean (SD) or % | Mean or % | |
| *Drivers who received medical examinations in hospitals other than the study base hospital. | |||||
| †Obtained from the Department of Statistics, Ministry of Transportation and Communication, Taiwan (34). | |||||
| ‡N1, number of subjects in TDHS group; N2, number of subject not in study base. The total number summed up across each category varies slightly due to missing data. | |||||
| §Assessed by the SF-36, Chinese version. | |||||
| ¶Assessed by the Job Content Questionnaire, Chinese version. | |||||
| **Assessed by the modified Nordic Musculoskeletal Questionnaire. | |||||
| Age (years) | 1242 | 44.5 (8.7) | 1403 | 46.6 (8.7) | 43.9 |
| Professional seniority (years) | 1234 | 11.4 (7.8) | 1890 | 11.0 (7.5) | 9.2 |
| Total days of driving/month (days) | 1239 | 26.2 (2.6) | 1780 | 25.2 (3.6) | 26.8 |
| Hours of driving/day (hours) | 1238 | 9.8 (2.8) | 1889 | 9.9 (2.5) | 10 |
| Body mass index (kg/m2) | 1242 | 24.9 (3.6) | 1780 | 25.2 (3.6) | – |
| Gender | |||||
| Male | 1193 | 96% | 1854 | 96% | 97% |
| Female | 49 | 4% | 82 | 4% | 3% |
| Education | |||||
| Below high school | 405 | 33% | 770 | 40% | – |
| High school | 782 | 63% | 1067 | 56% | – |
| College and beyond | 53 | 4% | 69 | 4% | – |
| Marital status | |||||
| Single | 201 | 16% | 257 | 14% | – |
| Married | 960 | 75% | 1469 | 77% | – |
| Separated/divorced/widowed | 116 | 9% | 178 | 10% | – |
| Registration type | |||||
| Individual | 497 | 40% | 808 | 43% | – |
| Cooperative | 395 | 32% | 606 | 33% | – |
| Cab company affiliated | 341 | 28% | 447 | 24% | – |
| Lifting activities | |||||
| Never/rare/seldom | 604 | 49% | – | – | – |
| Often/sometimes | 508 | 41% | – | – | – |
| Very frequently | 122 | 10% | – | – | – |
| Bending/twisting | |||||
| Never/rare/seldom | 643 | 52% | – | – | – |
| Often/sometimes | 482 | 39% | – | – | – |
| Very frequently | 111 | 9% | – | – | – |
| Leisure time physical exertion | |||||
| Never/rare/seldom | 602 | 49% | – | – | – |
| Often/sometimes | 506 | 41% | – | – | – |
| Very frequently | 126 | 10% | – | – | – |
| Perceived job stress | |||||
| None | 282 | 23% | – | – | – |
| Mild | 639 | 52% | – | – | – |
| Moderate–severe | 311 | 25% | – | – | – |
| §Mental health score (0–100) | 1218 | 63.1 (16.8) | – | – | – |
| ¶Job dissatisfaction index (0.01–1) | 1225 | 0.61 (0.17) | – | – | – |
| **Low back pain in past 12 months | 628 (1241) | 51% | 988 (1798) | 55% | – |