| Â | Treatment | Waiting list | Effect size | Mixed models |
|---|
| Â |
n
|
m
|
SD
|
n
|
m
|
SD
| Cohen's d(95% CI) | Effect |
B
|
p
|
|---|
GSRS-IBS
| Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Pre | 30 | 44.6 | 11.1 | 31 | 39.8 | 12.0 | Â | Group | 4.9 | .12 |
Post | 23 | 31.0 | 10.2 | 27 | 40.9 | 14.5 | 0.77 (0.19 - 1.34) | Time | 0.6 | .63 |
FU | 19 | 29.9 | 12.6 |  |  |  |  | G×T | -11.7 | .001 |
IBS-QOL
| Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Pre | 30 | 67.4 | 20.9 | 31 | 76.1 | 18.8 | Â | Group | -8.8 | .09 |
Post | 23 | 82.6 | 13.4 | 27 | 67.4 | 23.1 | 0.79 (0.20-1.35) | Time | -7.2 | .001 |
FU | 20 | 87.6 | 11.8 |  |  |  |  | G×T | 16.6 | .001 |
VSI
| Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Pre | 30 | 32.5 | 18.0 | 31 | 27.5 | 16.3 | Â | Group | 5.0 | .22 |
Post | 23 | 14.1 | 15.1 | 27 | 26.2 | 17.9 | 0.73 (0.14 - 1.29) | Time | -11.7 | .01 |
FU | 20 | 15.5 | 15.9 |  |  |  |  | G×T | -14.6 | .001 |
| Â | Â | Â | Â | Â | Â | Â | Â | COV | 0.3 | .03 |
Sheehan
Disability Scales
| Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Pre | 30 | 11.9 | 8.1 | 31 | 8.7 | 6.3 | Â | Group | 3.2 | .08 |
Post | 23 | 6.4 | 6.7 | 27 | 7.8 | 7.6 | 0.19 (-0.37 - 0.75) | Time | -4.4 | .01 |
FU | 20 | 5.2 | 6.6 |  |  |  |  | G×T | -4.2 | .002 |
| Â | Â | Â | Â | Â | Â | Â | Â | COV | 0.1 | .04 |
- Unstandardized (B) coefficients and their p-values are given for fixed in effects in linear mixed models using all data from pre-treatment and post-treatment and all individuals (n = 61). The coefficient associated with the main effect of group denotes average score difference between the groups at the pre-treatment assessment. The coefficient associated with the effect of time denotes the average change score from pre to post-treatment across both groups. The coefficient associated with the effect of G × T (group × time) denotes the difference between groups in change score from pre- to post-treatment. COV is the effect of the pre-treatment value of GSRS-IBS, as a retained covariate in the model, on the post-treatment value. Group0 = Treatment Group, Group1 = Waiting List, Time0 = Pre-treatment, and Time1 = Post-treatment. Effect sizes are calculated as standardized mean difference (Cohen's d) at post-treatment. GSRS-IBS: Gastrointestinal symptom rating scale-IBS version. IBS-QOL: The Irritable Bowel Syndrome Quality of Life Instrument (IBS-QOL). VSI: The Visceral Sensitivity Index.
