Logistic regression analysis with six month SF36 change in health outcome as the dependent variable; variables selected in the final model are listed below with beta coefficient
| Variable selected | Beta (SE) | p Value | Odds ratio | % Correctly classified | |
|---|---|---|---|---|---|
| Organic disease (GORD, IHD) | |||||
| Step 1 | Age | −0.078 | 0.019 | 0.92 (0.87–0.99) | 61.2 |
| Step 2 | HAD total score | −0.094 | 0.027 | 0.91 (0.84–0.99) | 71.4 |
| Constant | 5.964 | 0.004 | |||
| Functional disorders (FD, NCCP) | |||||
| Step 1 | Age | −0.070 | 0.029 | 0.94 (0.88–0.99) | 73.6 |
| Step 2 | HAD total score | −0.152 | 0.001 | 0.86 (0.78–0.94) | 76.4 |
| Constant | 6.827 | 0.001 | |||