| PMC full text: | Spine J. Author manuscript; available in PMC 2016 Jul 1. Published in final edited form as: Spine J. 2015 Jul 1; 15(7): 1577–1586. Published online 2015 Mar 13. doi: 10.1016/j.spinee.2015.03.003 |
Table 4
Proportion of Patients with Chronic Pain in Each Risk Group and Likelihood Ratios for Correct Risk Classification.
| Risk group (total N) | Number of Patients | Percentage with chronic back pain (95% CI) | Likelihood ratio (95% CI) | |
|---|---|---|---|---|
| with chronic back pain | without chronic back pain | |||
| 6 month model (509) | 67 | 442 | ||
|
| ||||
| Low risk (score < - 4) | 9 | 230 | 3.8 (1.7 – 7.0) | 0.26 (0.14 – 0.48) |
| Moderate risk (score -4 to 7) | 27 | 165 | 14.1 (9.5 – 19.8) | 1.1 (0.79 – 1.5) |
| High risk (score ≥8) | 31 | 47 | 39.7 (28.8 – 51.5) | 4.4 (3.0 – 6.3) |
|
| ||||
| 2 year model (440) | 82 | 358 | ||
|
| ||||
| Low risk (score < - 4) | 22 | 194 | 10.1% (6.49–15.0) | 0.50 (0.34–0.72) |
| Moderate risk (score -4 to 7) | 32 | 125 | 20.4% (14.4–27.5) | 1.12 (0.82–1.52) |
| High risk (score ≥8) | 28 | 39 | 41.8% (29.8–54.5) | 3.14 (2.06–4.78) |