Table 2: Descriptive statistics and Cronbach's alpha coefficients of dependent and independen variables ().
Variables
Mean
SD
Items
Range
The Cronbach’s alpha
GHQ-12(1)
29.77
5.56
12
17–48
0.84
GHQ-12(2)
4.66
2.20
12
0–11
0.48
Effort(3)
13.69
4.74
6
6–30
0.87
Rewards(3)
39.92
8.29
11
11–55
0.91
Overcommitment(3)
13.60
3.48
6
6–24
0.80
Depressive(4)
1.42
0.17
21
1.00–1.86
0.69
Cyclothymic(4)
1.30
0.22
21
1.00–2.00
0.85
Hyperthymic(4)
1.27
0.18
21
1.00–1.86
0.78
Irritable(4)
1.18
0.18
21
1.00–1.86
0.85
Anxious(4)
1.24
0.21
26
1.00–1.96
0.89
(1)Scored using the Likert method (1-2-3-4).
(2)Scored using the GHQ method (0-0-1-1).
(3)Subscales of the Japanese short version of Effort-Reward Imbalance scale.
(4)Affective temperaments assessed by the TEMPS-A.