Effectiveness of three interventions for secondary prevention of low back pain in the occupational health setting - a randomised controlled trial with a natural course control

Table 4 The number of accumulated sickness absence (SA) days and periods in 4 years^a,b,c. Means, mean differences (MD) and 95% confidence intervals (95% CI)

Outcomes	Rehab		Physio		Advice		Control		Rehab vs. Control			Physio vs. Control			Advice vs. Control
Outcomes	mean	95% CI	mean	95% CI	mean	95% CI	mean	95% CI	MD	95% CI	p	MD	95% CI	p	MD	95% CI	p
Primary Outcome
SA days	67	50 to 91	74	54 to 99	84	61 to 114	72	55 to 96	−5	−34 to 24	0.73	1	−29 to 31	0.94	11	−22 to 44	0.51
Secondary Outcome
SA periods	8	6 to 11	12	9 to 17	15	11 to 21	13	10 to 17	−5	−10 to 0	0.03	−1	−6 to 5	0.84	2	−4 to 8	0.47

^aMain analysis includes 176 participants in Rehab (43), Physio (43), Advice (40) and Control (51) groups
^bAnalyses were calculated with IBM SPSS 24 version’s Generalised linear models Negative binomial with loglink procedure
^cSA days and periods during one year before the intervention were used as covariates, respectively

ISSN: 1471-2458