Table 3.

Multivariate regression analyses predicting health-related quality of life by the psychosocial predictor variables controlling for demographic variables in adults with irritable bowel syndrome

Predictor variables	β	95% CI for β		Semi-partial eta-square
Age	−0.1179078	−0.5165177	0.2807021	0.0119
Sex (Female)	−7.2099430	−12.5963252	−1.8235608	0.0095
Pain	−2.3974491	−3.6435407	−1.1513575	0.3131
Catastrophizing	−1.1027754	−1.5275834	−0.6779674	0.3149
Anxiety	−1.2723519	−2.2751593	−0.2695445	0.0794
Somatization	1.5202876	0.6005868	2.4399884	0.0000
Depression	−2.4499983	−3.6279140	−1.2720826	0.0003
Anxiety*somatization	−0.1659669	−0.2506989	−0.0812349	0.0353
Anxiety*depression	0.2228991	0.1355720	0.3102263	0.0258
R 2 full model	0.79***	NA

βstandardized regression coefficients (beta weights), R ² percentage of variability in the dependent variable (HRQOL mean) explained in the model

*p < 0.05, **p < 0.01, ***p < 0.0001