Study parameter

Variables

Frequency (n)

Percentage (%)

Job category

Technician

75

37.5

Non-technical staff

59

29.5

Mechanic

38

19

Engineer

15

7.5

Technical Staff

13

6.5

Work experience (years)

0 - 2

60

30.2

3 - 4

54

27.1

5 - 6

47

23.6

7 - 8

23

11.6

9 - 10

4

2.0

More than 10

11

5.5

Missing data

1

-

Working hours per week

Up to 40 hours

87

43.7

40 to 60 hours

86

43.2

60 to 80 hours

11

5.5

More than 80 hours

15

7.5

Missing data

1

-

On-the-job training

Yes

172

87.8

No

24

12.2

Missing data

3

-