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 ORa | 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