Table 5.
Multivariate analyses testing associations with the outcome variable. Significant findings are in bold.
| Models | Variables tested | OR and 95% CI | • Sensitivity • Specificity • Numbers correctly classified • Area under the ROC |
| "Best" Swedish model re-tested, according to previous study | Leg pain | 1.6 (1.2–2.1) | 41%, 87%, 71.5%, 72% |
| Duration of pain past yr | 1.1 (0.8–1.6) | ||
| Better at 2nd visit | 4.7 (3.4–6.6) | ||
| "Full" Swedish model, i.e. including significant variables that had been included in previous study | Leg pain | 1.5 (1.1–2.0) | 47%, 83%, 71%, 72% |
| Duration of pain past yr | 1.2 (0.8–1.7) | ||
| Better at 2nd visit | 4.7 (3.4–6.6) | ||
| Duration of pain at base-line | 1.0 (0.7–1.3) | ||
| Immediate improvement | 1.3 (1.0–1.7) | ||
| Improved Swedish model, i.e. removing irrelevant variables from the model above | Leg pain | 1.6 (1.2–2.2) | 41%, 87%, 72%, 71% |
| Better at 2nd visit | 4.8 (3.5–6.8) | ||
| Final minimal Swedish model, i.e. retaining the "best" variable | Better at 2nd visit | 4.9 (3.6–6.8) | 68%, 69%, 69%, 69% |
| Full Finnish model, i.e. allowing for the three new variables included in the present study | Leg pain | 1.4 (1.0–2.0) | 52%, 83%, 73%, 73% |
| Duration of pain past yr | 1.1 (0.8–1.6) | ||
| Better at 2nd visit | 5.0 (3.5–7.1) | ||
| Duration of pain at base-line | 0.9 (0.7–1.3) | ||
| Immediate improvement | 1.2 (0.9–1.6) | ||