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Table 1 Demographic and driving work-related information of the study sample

From: Measuring job stress in transportation workers: psychometric properties, convergent validity and reliability of the ERI and JCQ among professional drivers

Feature

Category

Frequency

Percentage

Gender

Female

10

1.4%

Male

713

98.6%

Days working (driving) a week

3 or less

8

1.1%

4

21

2.9%

5

493

67.9%

6

162

22.3%

7

21

2.9%

No regularity

21

2.9%

Hours driving per day

< 5 h

49

6.7%

5–8 h

387

53.3%

9–12 h

261

35.9%

> 12 h

6

0.9%

No regularity

23

3.2%

Shift working

Yes

324

44.6%

No

382

52.6%

Only exceptionally

20

2.8%

Transportation modality

Passenger

168

23.1%

Cargo

521

71.8%

Other

37

5.1%

Type of vehicle

Urban Bus

31

4.3%

Intercity Bus

121

16.7%

Van or smaller company vehicle

57

7.8%

Long-haul / freight vehicle

486

66.9%

Other

31

4.3%