Table 2.
Summary of hierarchical logistical regression analysis predicting the presence of irritable bowel syndrome (IBS) (95% BCa bootstrap confidence intervals based on 5,000 samples).
| b | p | 95% Confidence Interval | 95% Confidence Interval for Odds Ratio | ||||
|---|---|---|---|---|---|---|---|
| Lower | Upper | Lower | Odds | Upper | |||
| Step 1 | |||||||
| Constant | −4.48 | .003** | −11.38 | −1.88 | |||
| Anxiety | 0.05 | .225 | −0.03 | 0.23 | 0.96 | 1.05 | 1.15 |
| Depression | 0.19 | .004** | 0.06 | 0.46 | 1.06 | 1.21 | 1.37 |
| Step 2 | |||||||
| Constant | −4.53 | .006** | −16.71 | −0.92 | |||
| Anxiety | 0.05 | .243 | −0.03 | 0.41 | 0.96 | 1.05 | 1.16 |
| Depression | 0.19 | .002** | 0.07 | 0.75 | 1.06 | 1.21 | 1.38 |
| HFnu | −0.004 | .860 | −0.12 | 0.09 | 0.95 | 1 | 1.04 |
| Cortisol | <0.001 | .906 | −0.02 | 0.01 | 1 | 1 | 1.01 |
| Step 3 | |||||||
| Constant | −2.43 | .223 | −401.51 | 646.37 | |||
| Anxiety | 0.05 | .258 | −2.43 | 15.01 | 0.94 | 1.05 | 1.18 |
| Depression | 0.24 | .024 | −0.06 | 80.25 | 1.03 | 1.28 | 1.58 |
| HFnu | −0.04 | .327 | −21.73 | 2.17 | 0.90 | 0.96 | 1.03 |
| Cortisol | 0.001 | .492 | −0.53 | 0.43 | 1 | 1 | 1.01 |
| DAF | −0.42 | .033 | −146.99 | 0.23 | 0.42 | 0.65 | 1.01 |
| DIA | 1.25 | .010** | 0.35 | 367.91 | 1.31 | 3.48 | 9.21 |
**≤.01. HFnu, High Frequency Normalized unit; DAF, Difficulty in awareness of feelings; DIA, Difficulty in interoceptive abilities dimension of the Toronto Alexithymia Scale; DIF, Difficulty identifying feelings; DDF, Difficulty describing feelings.