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Clinical management of unruptured intracranial aneurysm in Germany: a nationwide observational study over a 5-year period (2005-2009).

Abstract：

OBJECTIVES:Our aim was to provide nationwide age-standardised rates (ASR) on the usage of endovascular coiling and neurosurgical clipping for unruptured intracranial aneurysm (UIA) treatment in Germany. SETTING:Nationwide observational study using the Diagnosis-Related-Groups (DRG) statistics for the years 2005-2009 (overall 83 million hospitalisations). PARTICIPANTS:From 2005 to 2009, overall 39 155 hospitalisations with a diagnosis of UIA occurred in Germany. PRIMARY OUTCOME MEASURES:Age-specific and age-standardised hospitalisation rates for UIA with the midyear population of Germany in 2007 as the standard. RESULTS:Of the 10 221 hospitalisations with UIA during the observation period, 6098 (59.7%) and 4123 (40.3%) included coiling and clipping, respectively. Overall hospitalisation rates for UIA increased by 39.5% (95% CI 24.7% to 56.0%) and 50.4% (95% CI 39.6% to 62.1%) among men and women, respectively. In 2005, the ASR per 100 000 person years for coiling was 0.7 (95% CI 0.62 to 0.78) for men and 1.7 (95% CI 1.58 to 1.82) for women. In 2009, the ASR was 1.0 (95% CI 0.90 to 1.10) and 2.4 (95% CI 2.24 to 2.56), respectively. Similarly, the ASR for clipping in 2005 amounted to 0.6 (95% CI 0.52 to 0.68) for men and 1.1 (95% CI 1.00 to 1.20) for women. These rates increased in 2009 to 0.8 (95% CI 0.72 to 0.88) and 1.7 (95% CI 1.58 to 1.82), respectively. We observed a marked geographical variation of ASR for coiling and less pronounced for clipping. For the federal state of Saarland, the ASR for coiling was 5.64 (95% CI 4.76 to 6.52) compared with 0.68 (95% CI 0.48 to 0.88; per 100 000 person years) in Saxony-Anhalt, whereas, ASR for clipping were highest in Rhineland-Palatinate (2.48, 95% CI 2.17 to 4.75) and lowest in Saxony-Anhalt (0.52, 95% CI 0.34 to 0.70). CONCLUSIONS:To the best of our knowledge, we presented the first representative, nationwide analysis of the clinical management of UIA in Germany. The ASR increased markedly and showed substantial geographical variation among federal states for all treatment modalities during the observation period.

journal_name

BMJ Open

journal_title

BMJ open

authors

Walendy V,Stang A

doi

10.1136/bmjopen-2016-012294

subject

Has Abstract

pub_date

2017-01-17 00:00:00

pages

e012294

issue

issn

2044-6055

pii

bmjopen-2016-012294

journal_volume

pub_type

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Clinical management of unruptured intracranial aneurysm in Germany: a nationwide observational study over a 5-year period (2005-2009).