Table 1.

Symptoms and signs at time of presentation to Mayo Clinic [number (percentage) unless otherwise stated]. Evidence of rectal evacuation disorder was based on abnormal balloon expulsion and/or abnormal anal manometry.

Clinical and Radiological Features
Bowel movements (BM)
Average number BM/week	1.5 (range 1-2.5)
Straining >25% of the time	5/24 (21%)
Sense of incomplete evacuation	5/24 (21%)
Digital maneuvers to evacuate BM	1/24 (4%)
Abdominal pain (%)	20/24 (84%)
Bloating	23/24 (96%)
Abdominal distension	23/24 (96%)
Evidence of rectal evacuation disorder
Balloon expulsion requiring >200g weight	8/24 (33%)
Abnormal resting anal sphincter pressure	12/24 (50%)
Treatments received prior to evaluation
Fiber supplementation	3/24 (13%)
Osmotic laxative	12/24 (50%)
Prokinetic	10/24 (42%)
Enemas	8/24 (33%)
Maximum diameter (cm) of colon on radiological examination
Mean	12.74 ± 0.79 (SEM)
Median	12 (IQR10.8-13)