Cause
The Rome III diagnostic criteria can be used to classify functional gastrointestinal disorders, and may be useful when functional constipation is suspected and contributing medicines or medical conditions have been excluded.
Using the Rome III diagnostic criteria, constipation may be diagnosed if patients who do not take laxatives report at least two of the following in any three-month period during the previous six months:
Thompson WG, Longstreth GF, Drossman DA et al. Functional bowel disorders and functional abdominal pain. Gut 1999;45.
Does one have: