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Zuurbier CCM, Molenberg R, Mensing LA, Wermer MJH, Juvela S, Lindgren AE, Jääskeläinen JE, Koivisto T, Yamazaki T, Uyttenboogaart M, van Dijk JMC, Aalbers MW, Morita A, Tominari S, Arai H, Nozaki K, Murayama Y, Ishibashi T, Takao H, Gondar R, Bijlenga P, Rinkel GJE, Greving JP, Ruigrok YM. Sex Difference and Rupture Rate of Intracranial Aneurysms: An Individual Patient Data Meta-Analysis. Stroke 2022; 53:362-369. [PMID: 34983236 PMCID: PMC8785514 DOI: 10.1161/strokeaha.121.035187] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Supplemental Digital Content is available in the text. Background and Purpose: In previous studies, women had a higher risk of rupture of intracranial aneurysms than men, but female sex was not an independent risk factor. This may be explained by a higher prevalence of patient- or aneurysm-related risk factors for rupture in women than in men or by insufficient power of previous studies. We assessed sex differences in rupture rate taking into account other patient- and aneurysm-related risk factors for aneurysmal rupture. Methods: We searched Embase and Pubmed for articles published until December 1, 2020. Cohorts with available individual patient data were included in our meta-analysis. We compared rupture rates of women versus men using a Cox proportional hazard regression model adjusted for the PHASES score (Population, Hypertension, Age, Size of Aneurysm, Earlier Subarachnoid Hemorrhage From Another Aneurysm, Site of Aneurysm), smoking, and a positive family history of aneurysmal subarachnoid hemorrhage. Results: We pooled individual patient data from 9 cohorts totaling 9940 patients (6555 women, 66%) with 12 193 unruptured intracranial aneurysms, and 24 357 person-years follow-up. Rupture occurred in 163 women (rupture rate 1.04%/person-years [95% CI, 0.89–1.21]) and 63 men (rupture rate 0.74%/person-years [95% CI, 0.58–0.94]). Women were older (61.9 versus 59.5 years), were less often smokers (20% versus 44%), more often had internal carotid artery aneurysms (24% versus 17%), and larger sized aneurysms (≥7 mm, 24% versus 23%) than men. The unadjusted women-to-men hazard ratio was 1.43 (95% CI, 1.07–1.93) and the adjusted women/men ratio was 1.39 (95% CI, 1.02–1.90). Conclusions: Women have a higher risk of aneurysmal rupture than men and this sex difference is not explained by differences in patient- and aneurysm-related risk factors for aneurysmal rupture. Future studies should focus on the factors explaining the higher risk of aneurysmal rupture in women.
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Affiliation(s)
- Charlotte C M Zuurbier
- UMC Utrecht Brain Center, Department of Neurology and Neurosurgery, University Medical Center Utrecht, the Netherlands. (C.C.M.Z, L.A.M., G.J.E.R., Y.M.R.)
| | - Rob Molenberg
- Department of Neurosurgery, University Medical Center Groningen, the Netherlands. (R.M., J.M.C.v.D., M.W.A.)
| | - Liselore A Mensing
- UMC Utrecht Brain Center, Department of Neurology and Neurosurgery, University Medical Center Utrecht, the Netherlands. (C.C.M.Z, L.A.M., G.J.E.R., Y.M.R.)
| | - Marieke J H Wermer
- Department of Neurology, Leiden University Medical Center, the Netherlands (M.J.H.W.)
| | - Seppo Juvela
- Department of Clinical Neurosciences, University of Helsinki, Finland (S.J.)
| | - Antti E Lindgren
- Department of Clinical Radiology, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Neurosurgery of NeuroCenter, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Institute of Clinical Medicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio (A.E.L, J.E.J., T.K.)
| | - Juha E Jääskeläinen
- Department of Clinical Radiology, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Neurosurgery of NeuroCenter, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Institute of Clinical Medicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio (A.E.L, J.E.J., T.K.)
| | - Timo Koivisto
- Department of Clinical Radiology, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Neurosurgery of NeuroCenter, Kuopio University Hospital, Finland. (A.E.L, J.E.J., T.K.).,Institute of Clinical Medicine, School of Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio (A.E.L, J.E.J., T.K.)
| | - Tomosato Yamazaki
- Department of Neurosurgery, National Hospital Organization, Mito Medical Center, Japan (T.Y.)
| | - Maarten Uyttenboogaart
- Department of Neurology and Medical Imaging Center, University Medical Center Groningen, the Netherlands. (M.U.)
| | - J Marc C van Dijk
- Department of Neurosurgery, University Medical Center Groningen, the Netherlands. (R.M., J.M.C.v.D., M.W.A.)
| | - Marlien W Aalbers
- Department of Neurosurgery, University Medical Center Groningen, the Netherlands. (R.M., J.M.C.v.D., M.W.A.)
| | - Akio Morita
- Medical Center UCAS Japan Coordinating Office- University of Tokyo- Nippon Medical School, Neurological Surgery (A.M.)
| | - Shinjiro Tominari
- Department of Health Informatics, School of Public Health, Kyoto University, Japan (S.T.)
| | - Hajime Arai
- Department of Neurosurgery, Juntendo University- Medical School, Tokyo, Japan (H.A.)
| | - Kazuhiko Nozaki
- Department of Neurosurgery, Shiga University of Medical Science, Japan (K.N.)
| | - Yuichi Murayama
- Department of Endovascular Neurosurgery, Tokyo Jikei University School of Medicine, Japan (Y.M., T.I., H.T.)
| | - Toshihiro Ishibashi
- Department of Endovascular Neurosurgery, Tokyo Jikei University School of Medicine, Japan (Y.M., T.I., H.T.)
| | - Hiroyuki Takao
- Department of Endovascular Neurosurgery, Tokyo Jikei University School of Medicine, Japan (Y.M., T.I., H.T.)
| | - Renato Gondar
- Neurosurgery Division, Department of Clinical Neurosciences, Faculty of Medicine, Geneva University Medical Center, Switzerland (R.G., P.B.)
| | - Philippe Bijlenga
- Neurosurgery Division, Department of Clinical Neurosciences, Faculty of Medicine, Geneva University Medical Center, Switzerland (R.G., P.B.)
| | - Gabriel J E Rinkel
- UMC Utrecht Brain Center, Department of Neurology and Neurosurgery, University Medical Center Utrecht, the Netherlands. (C.C.M.Z, L.A.M., G.J.E.R., Y.M.R.)
| | - Jacoba P Greving
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, the Netherlands. (J.P.G.)
| | - Ynte M Ruigrok
- UMC Utrecht Brain Center, Department of Neurology and Neurosurgery, University Medical Center Utrecht, the Netherlands. (C.C.M.Z, L.A.M., G.J.E.R., Y.M.R.)
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Zuurbier CCM, Mensing LA, Wermer MJH, Juvela S, Lindgren AE, Koivisto T, Jääskeläinen JE, Yamazaki T, Molenberg R, van Dijk JMC, Uyttenboogaart M, Aalbers M, Morita A, Tominari S, Arai H, Nozaki K, Murayama Y, Ishibashi T, Takao H, Rinkel GJE, Greving JP, Ruigrok YM. Difference in Rupture Risk Between Familial and Sporadic Intracranial Aneurysms: An Individual Patient Data Meta-analysis. Neurology 2021; 97:e2195-e2203. [PMID: 34670818 DOI: 10.1212/wnl.0000000000012885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 09/20/2021] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND AND OBJECTIVES We combined individual patient data (IPD) from prospective cohorts of patients with unruptured intracranial aneurysms (UIAs) to assess to what extent patients with familial UIA have a higher rupture risk than those with sporadic UIA. METHODS For this IPD meta-analysis, we performed an Embase and PubMed search for studies published up to December 1, 2020. We included studies that (1) had a prospective study design; (2) included 50 or more patients with UIA; (3) studied the natural course of UIA and risk factors for aneurysm rupture including family history for aneurysmal subarachnoid haemorrhage and UIA; and (4) had aneurysm rupture as an outcome. Cohorts with available IPD were included. All studies included patients with newly diagnosed UIA visiting one of the study centers. The primary outcome was aneurysmal rupture. Patients with polycystic kidney disease and moyamoya disease were excluded. We compared rupture rates of familial vs sporadic UIA using a Cox proportional hazard regression model adjusted for PHASES score and smoking. We performed 2 analyses: (1) only studies defining first-degree relatives as parents, children, and siblings and (2) all studies, including those in which first-degree relatives are defined as only parents and children, but not siblings. RESULTS We pooled IPD from 8 cohorts with a low and moderate risk of bias. First-degree relatives were defined as parents, siblings, and children in 6 cohorts (29% Dutch, 55% Finnish, 15% Japanese), totaling 2,297 patients (17% familial, 399 patients) with 3,089 UIAs and 7,301 person-years follow-up. Rupture occurred in 10 familial cases (rupture rate: 0.89%/person-year; 95% confidence interval [CI] 0.45-1.59) and 41 sporadic cases (0.66%/person-year; 95% CI 0.48-0.89); adjusted hazard ratio (HR) for familial cases 2.56 (95% CI 1.18-5.56). After adding the 2 cohorts excluding siblings as first-degree relatives, resulting in 9,511 patients, the adjusted HR was 1.44 (95% CI 0.86-2.40). DISCUSSION The risk of rupture of UIA is 2.5 times higher, with a range from a 1.2 to 5 times higher risk, in familial than in sporadic UIA. When assessing the risk of rupture in UIA, family history should be taken into account.
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Affiliation(s)
- Charlotte C M Zuurbier
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Liselore A Mensing
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Marieke J H Wermer
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Seppo Juvela
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Antti E Lindgren
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Timo Koivisto
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Juha E Jääskeläinen
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Tomosato Yamazaki
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Rob Molenberg
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - J Marc C van Dijk
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Maarten Uyttenboogaart
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Marlien Aalbers
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Akio Morita
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Shinjiro Tominari
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Hajime Arai
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Kazuhiko Nozaki
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Yuichi Murayama
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Toshihiro Ishibashi
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Hiroyuki Takao
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Gabriel J E Rinkel
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Jacoba P Greving
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan
| | - Ynte M Ruigrok
- From the Department of Neurology and Neurosurgery, UMC Utrecht Brain Center (C.C.M.Z., L.A.M., G.J.E.R., Y.M.R.), and Julius Centre for Health Sciences and Primary Care (J.P.G.), University Medical Center Utrecht; Department of Neurology (M.J.H.W.), Leiden University Medical Center, the Netherlands; Department of Clinical Neurosciences (S.J.), University of Helsinki; Neurosurgery of NeuroCenter (A.E.L., T.K., J.E.J.), University of Eastern Finland, Kuopio, Finland; Department of Neurosurgery (T.Y.), National Hospital Organization, Mito Medical Center, Japan; Departments of Neurosurgery (R.M., J.M.C.v.D., M.U., M.A.), University Medical Center Groningen, the Netherlands; University of Tokyo-Nippon Medical School (A.M.); Department of Health Informatics, School of Public Health (S.T.), Kyoto University; Department of Neurosurgery (H.A.), Juntendo University Medical School, Tokyo; Department of Neurosurgery (K.N.), Shiga University of Medical Science; and Department of Endovascular Neurosurgery (Y.M., T.I., H.T.), Tokyo Jikei University School of Medicine, Japan.
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