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Relationship between rectoanal gradient, BET, and rectal evacuation in constipated patients. A, Rectal evacuation on defecography was associated with the results of HR-ARM and BET (P<.001). B, Among constipated patients with an abnormal BET, incomplete rectal evacuation on defecography was associated with an abnormal rectoanal gradient. BET indicates balloon expulsion test; HR-ARM, high-resolution anorectal manometry.
