Predictive ability of the start back tool: an ancillary analysis of a low back pain trial from Danish general practice

Table 3 Odds of STarT Back Tool high-risk patients achieving a 30% improvement in the Roland Morris Disability score after 8 weeks

Possible risk factors	Crude OR	95% CI	P-value	Adj OR^a	95% CI	P-value
STarT Back Tool (high-risk group)^b	0.40	0.24–0.67	< 0.001	0.36	0.18–0.73	0.004
Allocation group in the cluster randomized trial (intervention group)	0.99	0.63–1.55	0.963	0.95	0.55–1.62	0.840
Age (high)	1.00	0.98–1.02	0.995	1.00	0.97–1.02	0.790
Gender (male)	0.95	0.60–1.50	0.833	0.86	0.50–1.48	0.574
College education (yes)	1.12	0.66–1.90	0.678	0.71	0.38–1.32	0.278
Employment status (yes)	1.71	1.01–2.90	0.046	1.56	0.73–3.37	0.253
Sick leave (yes)^c	1.27	0.78–2.08	0.335	1.45	0.79–2.65	0.232
Numerical pain rating (high)	0.95	0.85–1.06	0.341	1.05	0.88–1.25	0.565
EQ VAS (high rated health)	1.02	1.01–1.03	0.001	1.02	1.01–1.04	0.006
Baseline RMDQ score	0.99	0.95–1.03	0.600	1.05	0.98–1.13	0.173

Note: Crude odds ratios (Crude OR) and adjusted odds ratios.^aAdjusted odds ratio (Adj OR) from a multiple regression analysis including all tabulated variables.^b Comparing the low-risk and medium-risk groups with the high-risk group. Age, numerical pain rating, and EQ VAS are included as continuous variables. STarT Back Tool, allocation in the previous study, gender, college education, employment status, and sick leave are included as dichotomised variables.^c Sick leave was coded yes if the patient reported any amount of LBP-related sick leave 14 days prior to baseline

ISSN: 1471-2474