Angiography versus colonoscopy in patients with severe lower gastrointestinal bleeding: a nation-wide observational study.

The present study revealed that in-hospital mortality did not significantly differ between colonoscopy and angiography, even in severe LGIB patients. Although this study was unable to identify which subgroups should undergo angiography for primary hemostasis, angiography might be a better option than colonoscopy for initial hemostasis in more severe cases of LGIB.