Biofeedback combined with diet is a valuable treatment option for patients with obstructed defecation syndrome associated with anismus, and more than half of our patients of both sexes achieved a satisfactory response. Improvement was not related to reversal of paradoxical contraction of puborectalis muscles at manometry. Patient sex, age, previous anorectal surgery, anorectal manometry pressures, and vaginal delivery, menopause, and hysterectomy in women did not significantly affect outcome.
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