. Author manuscript; available in PMC: 2019 Aug 1.

Published in final edited form as: Arch Phys Med Rehabil. 2018 Apr 3;99(8):1533–1539.e2. doi: 10.1016/j.apmr.2018.02.016

Table 3.

Performance characteristics for STarT Back risk group cutoffs to predict persistent, disabling back pain at 6 months^*

	Sensitivity	Specificity	Negative LR (95% CI)	Positive LR (95% CI)
STarT Back risk group cutoffs in MATCH (United States)
Low vs. Medium/High	81.0%	64.6%	0.29 (0.24–0.35)	2.29 (2.04–2.58)
Low/Medium vs. High	34.2%	91.8%	0.72 (0.67–0.77)	4.16 (3.08–5.60)
STarT Back risk group cutoffs in original validation study^a (United Kingdom⁴)
Low vs. Medium/High	80.1%	65.4%	0.30 (0.23–0.40)	2.32 (1.96–2.76)
Low/Medium vs. High	39.6%	94.6%	0.74 (0.67–0.81)	5.51 (3.30–9.28)

MATCH= Matching Appropriate Treatments to Consumers Healthcare needs trial, LR=likelihood ratio, CI=confidence interval

Persistent, disabling back pain is defined as RMDQ ≥7 at 6 months

data extracted from publications or provided by study authors