Table 5 Sensitivity analysis: A lower cut off score for the workability score (WAS; (i.e., 0–7 vs. 8–10)

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

Resource deficits

1.07

0.96–1.20

.258

Organisational control

0.97

0.84–1.12

.704

Role conflicts

0.69

0.59–0.81

 < .001

Role demands

0.80

0.68–0.94

.007

Group dynamics

0.82

0.70–0.96

.016

Buffer-function

0.91

0.79–1.05

.198

Co-workers

1.13

0.97–1.33

.121

Container-function

0.87

0.76–1.01

.066

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

Supportive management

0.98

0.88–1.08

.631

Cooperating co-workers

0.94

0.79–1.11

.451

Supportive colleagues

1.19

1.09–1.31

 < .001

Supportive private life

1.20

1.09–1.33

 < .001

Supportive org. structures

1.28

1.13–1.44

 < .001

Length of work experience as a principal

1–3 years of experience

1.31

0.98–1.76

.068

 > 3 to 5 years of experience

1.12

0.85–1.48

.410

 > 5 to 10 years of experience

1.18

0.92–1.51

.205

 > 10 years of experience

Ref

–

–

School-level

Pre-school

0.94

0.63–1.41

.762

Pre-and compulsory school

1.77

1.01–3.09

.047

Compulsory school

1.25

0.85–1.83

.256

Upper secondary school

1.19

0.78–1.82

.425

Adult education

Ref

–

–

Self-rated health

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

2.02

1.60–2.56

 < .001

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

Mean score

1.81

1.46–2.24

 < 0.001