Table 1 Means, standard deviations and comparison between the sample available at T1 only and the sample available at both T1 and T2.

(T1 only)

(T1 and T2)

sample 1 vs. sample 2

(n = 784-821)

(n = 310-324)

Dependent variables measured at T1 and T2

Mean

SD

Mean

SD

Job satisfaction at T1(1-9)

3.1

0.5

3.2

1.0

Job satisfaction at T2

3.2

-0.9

Emotional exhaustion at T1 (1-5)

2.0

0.6

2.0

-0.6

Emotional exhaustion at T2

2.0

0.7

Psychological distress at T1(0-4)

0.4

0.5

0.4

0.5

Psychological distress T2

0.3

0.5

Musculoskeletal pain T1 (0-21)

3.4

3.2

3.3

2.9

Musculoskeletal pain T2

3.5

3.0

Independent variables measured at T1

Women (%)

25.6

16.9

**

Age (18-60)

36.3

9.4

38.2

8.9

**

Neuroticism (0-9)

2.8

2.2

2.6

2.2

Control (0-9)

3.6

2.2

3.9

2.0

Exstroversion (0-9)

5.6

2.3

5.5

2.3

Self-efficacy (1-5)

3.0

0,5

3.1

0,5

*

Lack of co-worker support (F) (0-9)

3.1

2.8

3.5

3.0

*

Lack of leader support (F) (0-9)

1.9

2.2

2.2

2.4

*

Time pressure frequency (F) (0-9)

2.0

2.1

2.2

2.2

Challenging job tasks (F) (0-9)

2.6

1.9

2.7

1.9

Lack of co-worker support (S) (1-9)

5.3

1.7

5.5

1.6

Lack of leader support (S) (1-9)

5.1

1.7

5.1

1.7

Time pressure (S) (1-9)

4.3

1.5

4.3

1.4

Challenging job tasks (S) (1-9)

4.4

1.3

4.3

1.3

Non-emergency tasks (F) (0-9)

2.8

2.0

2.9

2.1

Physical demands (F) (0-9)

5.6

3.3

5.9

3.2

Serious Operational tasks (F) (0-9)

2.8

2.0

3.0

2.0

Non-emergency tasks (S) (1-9)

4.5

1.4

4.3

1.5

*

Physical demands (S) (1-9)

5.4

1.8

5.3

1.9

Serious Operational tasks (S) (1-9)

5.8

1.4

5.7

1.5