Clinical associations and risk factors for bleeding from colonic angiectasia: a case-controlled study.

Aim A case-controlled study was performed to investigate the association of colonic angiectasia with other conditions and to identify risk factors for bleeding. Method Information was collected from all patients who underwent colonoscopy at our hospital between January 2008 and December 2010. Data on 90 individuals with angiectasia [58 men; median age 69 (2692) years] were compared with those of 180 individuals without angiectasia, matched for gender and age. Results Multivariate analysis showed that occult gastrointestinal bleeding [odds ratio (OR) 2.523; 95% confidence interval (CI) 1.2385.142], liver cirrhosis (OR 13.195; 95% CI 3.50249.711), chronic renal failure (OR 6.796; 95% CI 1.59828.904) and valvular heart disease (OR 6.425; 95% CI 1.02840.165) were identified as significant predictors of the presence of colonic angiectasia. Eight patients were diagnosed with bleeding from angiectasia. Cardiovascular disease (OR 22.047; 95% CI 1.063457.345) and multiple angiectasias (P-value 0.0019) were identified as significant risk factors for active bleeding. Medication and a large size were not associated with an increased risk of bleeding. Conclusion The presence of colonic angiectasia was associated with valvular heart disease, liver cirrhosis and chronic renal failure. Valvular heart disease and multiple lesions increased the risk of bleeding.