Table 4.

Presence of any multivariable-adjusted association between potential explanatory factors and return-to-work following road traffic injury

Explanatory factors	Type 3 global p-value
	Any RTW	Full duties RTW	Full duties RTW: Interaction with time point*
Sociodemographic
Sex	-	-	0.020
Education	-	0.030	0.003
Language	-	0.013	-
Occupation	-	< 0.001	< 0.001
Income	0.001	-	0.03
Pre-injury health
Number of comorbidities	0.003	-	-
Injury factors
Crash type	0.007	0.026	< 0.001
Admission to hospital	0.015	< 0.001	< 0.001
Hospital length of stay	0.009	< 0.001	< 0.001
ISS	0.02	< 0.001	< 0.001
Perceived danger (death)	-	-	0.015
Insurance claim	0.001	< 0.001	< 0.001
Post-injury psychological/physical health status
Pain severity	0.001	< 0.001	< 0.001
PCS	0.008	0.019	0.002
DASS-21	< 0.001	0.007	0.002
IES-R	-	-	0.024
OMPSQ-SF	0.002	< 0.001	< 0.001

^*Overall p-value for the presence of effect modification between effects of the explanatory factor and time post-injury. PCS Pain Catastrophizing Scale, DASS-21 Depression and Anxiety Stress Scales, IES-R Impact of Events Scale Revised, OMPSQ-SF Örebro Musculoskeletal Pain Screening Questionnaire Short Form