Severe gastroparesis is associated with an increased incidence of slow-transit constipation as measured by wireless motility capsule.
Mark RadeticAfrin N KamalCarol RouphaelLei KouRuishen LyuMichael ClinePublished in: Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society (2020)
Patients with severe gastroparesis (>35% gastric retention at the 4-hour mark on solid-phase GES) have an increased likelihood of having underlying slow-transit constipation. Dyssynergic defecation does not appear to be associated with gastroparesis (of any severity).