Table II.

Associations between scores on the return-to-work self-efficacy (RTWSE) questionnaire at the end of the rehabilitation and number of sick leave days during 12 months of follow-up

		Number of sick leave daysa
		n	Crude mean	Crude mean differenceb	Adjusted mean differenceb,c	95% CI for adjusted mean difference
Total RTWSE score	Low < 5	51	158	0 (ref.)	0 (ref.)	0 (ref.)
	Medium 5–7.5	48	109	–49	–42	–76 to –8
	High > 7.5	26	68	–90	–85	–133 to –37
Meeting job demands	Low < 5	64	151	0 (ref.)	0 (ref.)	0 (ref.)
	Medium 5–7.5	40	96	–55	–36	–70 to –1
	High > 7.5	29	94	–57	–28	–72 to 17
Modifying job tasks	Low < 5	54	153	0 (ref.)	0 (ref.)	0 (ref.)
	Medium 5–7.5	49	112	–41	–31	–65 to 2
	High > 7.5	29	73	–80	–70	–112 to –28
Communicating needs to others	Low < 5	39	151	0 (ref.)	0 (ref.)	0 (ref.)
	Medium 5–7.5	45	132	–19	–22	–59 to 16
	High > 7.5	47	78	–73	–86	–131 to –42

RTWSE measured by RTWSE-19. It was scored as a total score and as 3 subscales (meeting job demands, modifying job tasks and communicating needs to others).

^aEstimated from linear regression analyses.

^bMean difference: difference in number of sick leave days relative to the reference group.

^cAdjusted for age, sex, education, rehabilitation programme and baseline score on the RTWSE questionnaire; CI: Confidence Interval.