Efficacy and Predictors for Biofeedback Therapeutic Outcome in Patients with Dyssynergic Defecation

Table 7

Univariate analysis of predictors of outcome of BFT.

Variables
General information
Age	−0.095	0.440
Gender	−0.112	0.202
Constipation duration	0.115	0.197
Symptoms
Defecation interval	−0.062	0.683
Straining	−0.121	0.149
Sensation of incomplete evacuation	−0.092	0.450
Sensation of blockage	−0.145	0.106
Painful defecation	−0.040	0.849
Stool consistency	−0.220	0.032
Psychological status
SAS	−0.184	0.093
SDS	−0.333	0.010
Quality of life indicators
General health perception	0.135	0.116
Physical functioning	0.112	0.202
Physical role function	0.289	0.025
Emotional role functioning	0.120	0.207
Social role functioning	0.153	0.104
Bodily pain	0.046	0.751
Vitality	0.196	0.084
Mental health	0.205	0.057
Lifestyle
Physical activity	−0.079	0.666
Work pressure	−0.089	0.490
Poor sleep quality	−0.078	0.666
Vegetable intake	0.145	0.106
Fruit intake	−0.062	0.683
Water intake	−0.095	0.468
High-fat diet predilection	0.017	0.800
Anorectal physiology
BET time	−0.188	0.091
CTT	−0.062	0.711
HR-ARM
Anal resting pressure	0.066	0.705
Maximum squeeze pressure	−0.030	0.761
Rectal defecation pressure	0.082	0.650
Intrarectal pressure	0.044	0.795
Rectoanal pressure differential	0.197	0.090
First sensation volume	−0.297	0.022
Urgency volume	−0.178	0.091
Maximum discomfort volume	−0.074	0.700
DD subtype	−0.099	0.365

BFT = biofeedback therapy; SAS = Zung’s Self-Rating Anxiety Scale; SDS = Zung’s Self-Rating Depression Scale; BET = balloon expulsion test; CTT = colonic transit time.