The mean change in each bowel symptom also did not significantly differ between treatment groups on ITT analyses , except for completeness of bowel movement , with the Senna group showing greater negative mean change in bowel movement completeness ( -0.56 1.01 vs -2.00 1.41 , P = 0.03 ) and for reduction of abdominal pain , favoring Senna ( -0.14 0.73 vs -0.73 1.08 , P = 0.04 ) .