1–6 months | 1–24 months | |||||
β | 95% CI | P value | β | 95% CI | P value | |
Brief Pain Inventory* | ||||||
Average pain | ||||||
Intercept | 3.11 | 2.63 to 3.60 | <0.001 | 2.76 | 2.38 to 3.13 | <0.001 |
Month since initial injury | −0.18 | −0.23 to −0.12 | <0.001 | −0.03 | −0.04 to −0.02 | <0.001 |
Regional anesthesia | −0.57 | −1.02 to −0.13 | 0.012 | −0.36 | −0.72 to −0.01 | 0.046 |
Pain relief | ||||||
Intercept | 66.12 | 59.00 to 73.24 | <0.001 | 66.24 | 60.60 to 71.89 | <0.001 |
Month since initial injury | 0.48 | −0.61 to 1.56 | 0.389 | −0.50 | −0.78 to −0.21 | 0.001 |
Regional anesthesia | 6.36 | 0.40 to 12.31 | 0.037 | 3.82 | −1.23 to 8.88 | 0.137 |
Worst pain | ||||||
Intercept | 5.70 | 5.02 to 6.37 | <0.001 | 5.14 | 4.61 to 5.67 | <0.001 |
Month since initial injury | −0.28 | −0.36 to −0.21 | <0.001 | −0.05 | −0.06 to −0.03 | <0.001 |
Regional anesthesia | −0.32 | −0.94 to 0.31 | 0.324 | −0.27 | −0.78 to 0.24 | 0.296 |
Pain interference | ||||||
Intercept | 2.39 | 1.82 to 2.97 | <0.001 | 2.30 | 1.87 to 2.73 | <0.001 |
Month since initial injury | −0.16 | −0.22 to −0.09 | <0.001 | −0.04 | −0.05 to −0.02 | <0.001 |
Regional anesthesia | −0.24 | −0.77 to 0.29 | 0.371 | −0.15 | −0.56 to 0.26 | 0.479 |
All models included a covariate for ISS and length of hospitalization. See online supplementary table 2 for more detail.
*Brief Pain Inventory outcomes worst, average, and pain interference range from 0, no pain, to 10, pain as bad as you can imagine. The Brief Pain Inventory pain relief is on a scale from 0%, no pain relief, to 100%, complete pain relief.
ISS, Injury Severity Scores.