Objective  To investigate the risk factors for rupture of small intracranial aneurysms.

  Methods  The clinical data of 235 patients with small intracranial aneurysm was retrospectively analyzed and divided into ruptured group (n=177) and unruptured group (n=58) according to whether aneurysm ruptured or not. The clinical data and tumor characteristics of the two groups were analyzed by univariate analysis, and the independent risk factors for small intracranial aneurysm rupture were analyzed by Logistic regression model.

  Results  There were significant differences in hypertension history, smoking history, drinking history, aneurysm location and aneurysm shape between the two groups (P < 0.05). History of hypertension, history of drinking alcohol, smoking, aneurysm location and shape are influencing factors for rupture of small intracranial aneurysm.

  Conclusion  Rupture of small intracranial aneurysm is closely related to the history of hypertension, drinking history, smoking history, aneurysm location and irregular shape of aneurysm.