STarT Back cut-off | Low vs Medium/High | Low/Medium vs High | ||||
---|---|---|---|---|---|---|
Follow-up | RR | 95% CI | P-value | RR | 95% CI | P-value |
4 weeks | 1.64 | (1.26–2.15) | < 0.001 | 1.71 | (1.18–2.49) | 0.002 |
8 weeks | 1.38 | (1.13–1.70) | 0.003 | 1.61 | (1.20–2.15) | < 0.001 |
52 weeks | 1.21 | (1.02–1.43) | 0.040 | 1.36 | (1.08–1.72) | 0.003 |