Table 2 Means, scale range, standard deviations and correlations among observed variables of latent constructs

1. psychological job demands

2. effort

0.49^**

3. job control

−0.12^**

−0.19^**

4. social support

−0.06

−0.25^**

0.39^**

5. reward

−0.25^**

−0.53^**

0.39^**

0.42^**

6. mental health

−0.19^**

−0.38^**

0.35^**

0.34^**

0.45^**

7. perceived work ability

−0.09*

−0.20^**

0.25^**

0.17^**

0.22^**

0.43^**

8. health status

−0.23^**

−0.37^**

0.21^**

0.20^**

0.32^**

0.43^**

0.39^**

9. age

−0.01

0.03

0.03

−0.14**

−0.02

0.16**

−0.02

−0.03

Mean

32.89

16.81

61.20

23.90

44.81

2.97

15.75

21.91

35.22

Scale range

12 ~ 48

6 ~ 30

24 ~ 96

8 ~ 32

11 ~ 55

1 ~ 4

3 ~ 27

3 ~ 18

21 ~ 60

Standard deviation

4.29

5.43

8.23

3.22

8.39

0.82

2.15

3.26

8.15

Skewness

0.72

−0.02

−0.32

0.03

−0.82

−0.30

−0.58

−1.13

0.55

Kurtosis

0.86

−0.45

0.78

2.97

0.18

−0.67

1.39

0.83

−0.42