Psyllium fiber vs. placebo in early treatment after STARR for obstructed defecation: A randomized double-blind clinical trial

BACKGROUND: Previous Literature has never evaluated the effectiveness of fiber intake after surgery for obstructed defecation in improving residual constipation and defecation urgency. METHODS: From May 2010 to June 2011, 65 patients were randomly assigned to either the active group (N.=32) or placebo group (N.=33) receiving 3.5 g/day of pure Psyllium fiber or inert compound respectively. During the 6-month follow-up score systems were evaluated: Longo's Obstructed Defecation Syndrome Score, Cleveland Constipation Score; Wexner incontinence Score and Visual Analogic Scale. We also recorded the incidence of postoperative defecation urgency. RESULTS: Active group reported less constipation at 1 week (ODS: 6.25±3.55 vs. 11.94±4.99, P