Table 4 Confounding effect of personal, work related and health related factors on the basic Cox PH model including depressive symptoms, fear‐avoidance and self‐efficacy as prognostic variables and the number of days on total compensation benefit as outcome variable (n = 160).

	Depressive symptoms		Fear‐avoidance (for work)		Self‐efficacy
Basic β values (no confounding variable)	−0.01381	Difference	−0.04660	Difference	−0.02680	Difference
Factors included
One at a time:
Perceived physical workload	−0.01375	1%	−0.04445	5%	−0.02702	1%
Work related physical factors
Heavy loading	−0.01381	0%	−0.05186	11%	−0.02546	55%
Repetitive tasks	−0.01294	6%	−0.04637	1%	−0.02597	3%
Psychosocial workload
Decision latitude	−0.01501	9%	−0.05340	15%	−0.01879	3%
Psychosocial demands	−0.01465	6%	−0.05888	26%	−0.02301	14%
Physical health	−0.01862	35%	−0.02541	45%	−0.04246	58%
Pain	−0.01233	11%	−0.02842	39%	−0.03366	26%
Family income*	−0.01613	17%	−0.04381	6%	−0.02533	5%
Personal income†	−0.01359	2%	−0.04642	1%	−0.02677	1%
Fear of income loss‡	−0.01042	25%	−0.04136	11%	−0.03643	36%
Claim history (previous 5 years)	−0.01357	2%	−0.04319	7%	−0.02577	4%

Dummy variables: *<$60 000; †<$40 000; ‡often.

All models are adjusted for age and gender.