gms | German Medical Science

60th Annual Meeting of the German Society of Neurosurgery (DGNC)
Joint Meeting with the Benelux countries and Bulgaria

German Society of Neurosurgery (DGNC)

24 - 27 May 2009, Münster

Correlation of aneurysm-related and epidemiological factors after SAH: results from a large cohort analysis

Meeting Abstract

  • N. Etminan - Neurochirurgische Klinik, Universitätsklinikum Düsseldorf
  • K. Beseoglu - Neurochirurgische Klinik, Universitätsklinikum Düsseldorf
  • B. Turowski - Institut für diagnostische Radiologie, Abteilung Neuroradiologie, Universitätsklinikum Düsseldorf
  • H.J. Steiger - Neurochirurgische Klinik, Universitätsklinikum Düsseldorf
  • D. Hänggi - Neurochirurgische Klinik, Universitätsklinikum Düsseldorf

Deutsche Gesellschaft für Neurochirurgie. 60. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit den Benelux-Ländern und Bulgarien. Münster, 24.-27.05.2009. Düsseldorf: German Medical Science GMS Publishing House; 2009. DocDI.03-08

doi: 10.3205/09dgnc125, urn:nbn:de:0183-09dgnc1256

Published: May 20, 2009

© 2009 Etminan et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.



Objective: Today the most accepted recommendation to treat asymptomatic aneurysms is in accordance to results of the ISUIA study. In this study factors such as aneurysm size and location were integrated in the rupture risk prediction together with known epidemiological risk factors. The goal of this retrospective analysis was to focus on the ruptured aneurysm in patients with subarachnoid haemorrhage (SAH) with regards to size, location and configuration in correlation with risk factors.

Methods: The analysis was based on data from 405 patients admitted to our department in a five-years period due to aneurysmal SAH. The aneurysm related data included size, location and configuration of the aneurysm. The clinical data in this analysis comprised initial grading according to the WFNS and Fisher and risk factors for aneurysm rupture, such as age, gender, hypertension and smoking. The correlation between aneurysm related factors and risk factors was performed using GraphPad® V5.

Results: Our patient population revealed a median age of 53.0±12.5 years with a male to female ratio of 1:1.6. The median ruptured aneurysm size was 5.9±4.4 mm with a distribution of 85.6% in the anterior circulation and 14.4% posteriorly. Aneurysm size in our population was distributed as such: a) <3mm = 19.7%, b) 4–7mm = 52.6%, c) 8–12mm = 17.8%, d) 13–25mm = 9.2% and e) >25mm=0.6%. 66.6 % of the patients had a history of hypertension, 33.3% for smoking. Spearman analysis showed that hypertension and aneurysm size were significantly correlated (r²: -0.174, p<0.005). T-test revealed that patients with hypertension as a risk factor had significantly smaller ruptured aneurysms as patients without hypertension (Mean 6.06±3.2 mm vs. 7.71±4.8 mm, respectively, p<0.001). Furthermore this correlation was pronounced for patients with nicotine abuse. Aneurysm size was not correlated to aneurysm configuration, whereas aneurysm location in the posterior circulation was significantly correlated (r²: 0.148, p<0.005) to poorer WFNS grades.

Conclusions: The present analysis of aneurysm related factors in patients with SAH demonstrated a highly significant correlation of the ruptured aneurysm size and the history for risk factors. Despite the limitation of a retrospective analysis the present data suggest that the rupture risk of smaller aneurysms increases significantly in patients with hypertension. Moreover the combination of hypertension and nicotine abuse potentiated this effect.