Methods in UCAS JAPAN and its value in EBM

Abstract

UCAS JAPAN (Unruptured Cerebral Aneurysm Study of Japan) is a large scale prospective cohort study to investigate the natural history and treatment results of unruptured intracranial aneurysms. The method adopted in the protocol is suitable under the present situation of knowledge and data for unruptured intracranial aneurysms. UCAS JAPAN provides the risk of rupture and treatment result for every peculiarity of unruptured aneurysms encountered in clinical practice and maintains a large data bank that may answer various hitherto unanswered questions. This study is only possible in Japan, where numerous numbers of asymptomatic unruptured intracranial aneurysms are being found in the brain dock. Consequently, a significant contribution to the international community is expected.