Table 6.
Backward linear regression models for predicting IBS symptom severity.
| Model | Predictor variables | β | t | P |
|---|---|---|---|---|
| 1 | Anxiety (SCL-90-R) | .255 | 3.10 | <.05 |
| Work overload (TICS) | .144 | 1.95 | .053 | |
| Dissatisfaction with job (TICS) | .100 | 1.35 | .180 | |
| Social tension (TICS) | .079 | 1.01 | .312 | |
| F(4,176) = 9.09, P < .001; adj. R 2 = .155 | ||||
|
| ||||
| 2 | Anxiety (SCL-90-R) | .284 | 3.68 | <.001 |
| Work overload (TICS) | .150 | 2.04 | <.05 | |
| Dissatisfaction with job (TICS) | .109 | 1.47 | .143 | |
| F(3,176) = 11.77, P < .001; adj. R 2 = .155 | ||||
| adj. ΔR 2 = −.005, F change(1,172) = 1.03, P = .312 | ||||
|
| ||||
| 3 | Anxiety (SCL-90-R) | .319 | 4.30 | <.001 |
| Work overload (TICS) | .157 | 2.14 | <.05 | |
| F(2, 176) = 16.47, P < .001; adj. R 2 = .149 | ||||
| adj. ΔR 2 = −.010, F change(1,173) = 2.17, P = .143 | ||||
IBS: irritable bowel syndrome, SCL-90-R: symptom checklist 90 revised, TICS: Trier inventory for the assessment of chronic stress.