Table 2

Associations between job characteristics and well-being in GPs and specialists

	GPs			Specialists			P for interaction†
	B	95% CI	p Value	B	95% CI	p Value
Psychological distress (GHQ)
Job demands
Total effect	0.15	0.11 to 0.18	0.000	0.04	−0.03 to 0.10	0.227	0.005
Within individual effect	0.19	0.12 to 0.26	0.000	0.03	−0.17 to 0.23	0.755
p for difference*			0.06
Job control
Total effect	−0.16	−0.22 to −0.09	0.000	−0.13	−0.24 to −0.02	0.019	0.65
Within individual effect	−0.08	−0.24 to 0.07	0.28	0.07	−0.29 to 0.42	0.71
p for difference*			0.48			0.07
Effort-reward-imbalance
Total effect	0.30	0.22 to 0.37	0.000	0.14	−0.02 to 0.29	0.077	0.06
Within individual effect	0.25	0.10 to 0.39	0.001	0.15	−0.23 to 0.54	0.440
p for difference*			0.13			0.70
Sleeping problems
Job demands
Total effect	0.32	0.20 to 0.43	0.000	0.31	0.12 to 0.51	0.002	0.99
Within individual effect	0.26	0.09 to 0.43	0.002	0.14	−0.23 to 0.50	0.46
p for difference*			0.22			0.15
Job control
Total effect	−0.20	−0.41 to 0.01	0.06	−0.15	−0.48 to 0.18	0.37	0.81
Within individual effect	−0.04	−0.37 to 0.28	0.79	0.25	−0.37 to 0.87	0.43
p for difference*			0.48			0.49
Effort-reward-imbalance
Total effect	0.66	0.44 to 0.88	0.000	0.69	0.27 to 1.10	0.001	0.91
Within individual effect	0.24	−0.08 to 0.56	0.15	0.50	−0.11 to 1.12	0.11
p for difference*			0.000			0.71

Multilevel longitudinal models with four repeated measurements.
Number of person-observations=1028, Number of groups (individuals)=699.
*p for difference between total effect versus within-individual effect.
†p for interaction effect between GP and specialists.
GHQ, General Health Questionnaire; GP, general practitioner.