TABLE 3.
Hierarchical regression predicting persistent back intensity, interference, and disability.
| Odds Ratio (OR) | 95% OR | LR test | p | % Accuracy | ||
|---|---|---|---|---|---|---|
| Persistent Back Pain Intensity | ||||||
| Step 1 | 11.01 | < 0.05 | 85.5 | |||
| Age | 0.99 | 0.92; 1.06 | ||||
| Sex | 2.22 | 0.32; 15.19 | ||||
| PCS | 1.11* | 1.03; 1.20 | ||||
| Step 2 | 5.31 | < 0.05 | 95.2 | |||
| PCS | 1.12* | 1.03; 1.21 | ||||
| PPT | 2.03* | 1.02; 4.07 | ||||
| Persistent Pain Interference | ||||||
| Step 1 | 16.51 | < 0.05 | 82.3 | |||
| Age | 0.97 | 0.92; 1.03 | ||||
| Sex | 1.70 | 0.37; 7.65 | ||||
| PCS | 1.12* | 1.05; 1.20 | ||||
| Step 2 | 3.84 | 0.05 | 83.9 | |||
| PCS | 1.11* | 1.04; 1.18 | ||||
| PPT | 1.56 | 0.93; 2.60 | ||||
| Persistent Disability | ||||||
| Step 1 | 40.18 | < 0.05 | 82.3 | |||
| Age | 0.94* | 0.88; 1.00 | ||||
| Sex | 3.75 | 0.71; 20.00 | ||||
| PCS | 1.28* | 1.13; 1.45 | ||||
| Step 2 | 1.72 | 0.19 | 82.3 | |||
| PCS | 1.27* | 1.12; 1.44 | ||||
| PPT | 1.32 | 0.83; 2.08 | ||||
*
p < 0.05,
Note: LR test is change in -2LL from the previous step. For step 1, LR test is change from the null model (e.g., Step 0). PPT values were reflected prior to conducting regression so higher values indicate higher pain sensitivity. Abbreviations: LR = likelihood ratio; n.s. = non-significant; PCS = pain catastrophizing scale; PPT = pressure pain threshold