Table 3.

Hazard ratios (HRs) for return to work after the first absence due to low back pain (n = 119)

	Unadjusted		Adjusted for the final model
	HR	95% CI	HR	95% CI
Age (for 10 years increment)	0.91	0.75–1.11	0.89a	0.69–1.15
Comorbidity
No	1		1.00	–
h/w pain	2.06	0.83–5.14	4.65a	1.16–18.73
s/n pain	0.67	0.41–1.10	0.61a	0.34–1.10
h/w and s/n pain	1.54	0.77–3.09	2.56a	0.95–6.89
Herniated disc history	0.61	0.36–1.04	0.47a	0.25–0.88
Having kids	0.81	0.56–1.18	0.59	0.31–1.12
Low back pain in past 12 months	0.81	0.56–1.18	0.58	0.26–1.29

^aCovariates of the final model