Risk factors for incidentally detected and symptomatic angiodysplasias: a case-control study with the general population as reference.

Background: There is no literature on risk factors for incidentally found angiodysplasias. In clinical practice, endoscopists may defer treatment owing to uncertainty about a causal role of any found angiodysplasia and overt or occult bleeding. The objective is to identify risk factors that distinguish incidental angiodysplasias from angiodysplasias that are the cause of symptomatic bleeding.