BACKGROUND AND PURPOSE: With the increased investigation of cerebral arteries using magnetic resonance angiography in the general population, the detection of unruptured @entity438 (UIAs) has increased. Understanding the distribution and factors associated with UIAs might be helpful for understanding the pathomechanism. METHODS: Subjects who underwent magnetic resonance angiography with a health examination at the Health Screening and Promotion Center were enrolled. The incidence and risk factors of UIAs (age, sex, @entity101 , @entity6 , smoking, @entity285 , and @entity453 ) were investigated by comparing @entity1 with and without UIAs. These risk factors were also investigated by the UIA location, distal internal carotid artery, anterior cerebral artery and middle cerebral artery (MCA), MCA bifurcation, anterior and posterior communicating artery, and posterior circulation. RESULTS: Among 187 166 subjects who received health examination, 18 954 underwent magnetic resonance angiography. Of them, 367 (1.93%) had UIAs. Age (odds ratio [OR], 1.02; P=0.003), @entity1 (OR, 2.00; P<0.001), @entity101 (OR, 2.21; P<0.001), smoking (OR, 1.66; P=0.001), and @entity453 (OR, 0.23; P<0.001) were independently associated with the presence of UIAs. @entity101 was associated with most UIAs, except for those located at sidewalls (anterior cerebral artery and MCA). MCA @entity439 were associated with old age and smoking. Distal internal carotid artery, posterior communicating artery, and MCA-bifurcation @entity439 were associated with female sex. Anterior communicating artery @entity439 were associated with smoking and @entity285 . Posterior circulation UIAs were only associated with @entity101 . @entity453 was negatively associated with anterior circulation @entity439 . CONCLUSIONS: The risk factors for UIAs differ by their location, compared with the control. Interestingly, the presence of @entity453 was protective against the presence of UIAs.

Risk Factors Associated With the Presence of Unruptured XXXX .

@entity1 :: ('9606', 'Species') :: ['women', 'patients'] @entity101 :: ('MESH:D006973', 'Disease') :: ['hypertension', 'Hypertension'] @entity6 :: ('MESH:D003920', 'Disease') :: ['diabetes mellitus'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms'] @entity453 :: ('MESH:D003324', 'Disease') :: ['Coronary artery disease', 'coronary artery disease'] @entity285 :: ('D000431', 'Chemical') :: ['alcohol'] @entity438 :: ('MESH:D002532', 'Disease') :: ['intracranial aneurysms']
@entity438 :: (MESH:D002532,Disease) :: ['Intracranial Aneurysms']
