Prospective study of biofeedback retraining in patients with chronic idiopathic functional constipation

Table 3 Symptoms Changes before and after Biofeedback (BE)

Symptoms	No. of patients before BF	No. of patients 10 days after BF	No. of patients 1 year after BF
Difficult evacuation	50	16a	13a
Hard stools	40	18b	16b
Loose stools at onset of abd. Pain	39	19 (NS)	22 (NS)
No sense of defecate in 1 week	35	20 (NS)	16 (NS)
Need for digitations	21	11 (NS)	11 (NS)
Sense of incomplete emptying	31	18 (NS)	16 (NS)
Distention or bloating	42	15b	13b
Laxative dependence	48	12 (P < 0.01)	14a
Need of enema	31	9b	9b
Perianal pain at defecation	30	16 (NS)	11 (NS)

^aP < 0.01 vs before BF,

^bP < 0.05 vs before BF.