Table 3 Unadjusted logistic regression analyses between the continuous GMSI scores and the dichotomized workability score (WAS)

GMSI demanding circumstances, effect per unit increase in mean score (1–5)

Resource deficits

0.75

0.68–0.82

 < 0.001

0.77

0.69–0.86

 < 0.001

0.66

0.54–0.81

 < 0.001

Organisational control

0.60

0.54–0.67

 < 0.001

0.59

0.52–0.66

 < 0.001

0.65

0.52–0.82

 < 0.001

Role conflicts

0.50

0.44–0.55

 < 0.001

0.49

0.43–0.56

 < 0.001

0.50

0.40–0.63

 < 0.001

Role demands

0.43

0.38–0.49

 < 0.001

0.41

0.35–0.47

 < 0.001

0.50

0.39–0.64

 < 0.001

Group dynamics

0.54

0.47–0.61

 < 0.001

0.55

0.47–0.63

 < 0.001

0.51

0.28–0.67

 < 0.001

Buffer-function

0.60

0.54–0.67

 < 0.001

0.59

0.52–0.66

 < 0.001

0.65

0.53–0.91

 < 0.001

Co-workers

0.73

0.65–0.83

 < 0.001

0.78

0.68–0.90

0.001

0.55

0.42–0.73

 < 0.001

Container-function

0.58

0.52–0.65

 < 0.001

0.60

0.53–0.68

 < 0.001

0.51

0.40–0.64

0.001

GMSI supportive circumstances, effect per unit increase in mean score (1–5)

Supportive management

1.39

1.27–1.51

 < 0.001

1.43

1.30–1.57

 < 0.001

1.22

1.01–1.48

0.037

Cooperating co-workers

1.59

1.37–1.84

 < 0.001

1.57

1.33–1.85

 < 0.001

1.69

1.22–2.36

0.002

Supportive colleagues

1.32

1.21–1.45

 < 0.001

1.31

1.18–1.46

 < 0.001

1.36

1.11–1.66

0.003

Supportive private life

1.61

1.45–1.78

 < 0.001

1.60

1.43–1.79

 < 0.001

1.62

1.29–2.03

 < 0.001

Supportive org. structures

1.74

1.56–1.94

 < 0.001

1.70

1.51–1.94

 < 0.001

1.87

1.47–2.39

 < 0.001

Length of work experience as a principal

1–3 years of experience

1.02

0.77–1.34

.907

1.03

0.75–1.40

0.864

0.91

0.49–1.68

0.761

 > 3–5 years of experience

0.91

0.69–1.18

.461

0.88

0.65–1.20

0.411

1.02

0.59–1.76

0.938

 > 5 to 10 years of experience

0.94

0.74–1.20

.621

0.98

0.74–1.29

0.860

0.84

0.52–1.36

0.476

 > 10 years of experience

Ref

–

–

Ref

–

–

Ref

–

–

School-level

Pre-school

1.28

0.86–1.90

.223

1.33

0.82–2.13

0.246

0.71

0.20–2.50

0.599

Pre-and compulsory school

1.70

1.01–2.89

.047

1.61

0.87–2.99

0.127

2.87

0.75–6.94

0.145

Compulsory school

1.32

0.90–1.94

.151

1.39

0.87–2.22

0.137

1.12

0.58–2.18

0.734

Upper secondary school

1.30

0.85–2.00

.222

1.18

0.69–2.02

0.541

1.46

0.72–2.96

0.293

Adult education

Ref

–

–

Ref

–

–

Ref ara>

–

–

Self-rated health

Poor, neither good nor poor(= 0) vs. good, very good (= 1)

3.22

2.44–4.24

 < 0.001

3.21

2.35–4.37

 < 0.001

3.24

1.71–6.03

 < 0.001

Self-efficacy, effect per unit increase in mean score (1–5)

Mean score

2.50

2.04–3.07

 < 0.001

2.52

1.99–3.18

 < 0.001

2.50

1.62–3.85

 < 0.001