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P-019 stability of the cerebral aneurysms after stent-assisted coil embolization: a propensity score-matched analysis
  1. H Kang1,
  2. W Cho1,
  3. H Hong2,
  4. J Kim1,
  5. Y Cho3,
  6. O Kwon4,
  7. J Bang4,
  8. G Hwang4,
  9. Y Son5,
  10. C Oh4,
  11. M Han3
  1. 1Neurosurgery, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea, Republic Of Korea
  2. 2Medical Research Collaborating Center, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea, Republic Of Korea
  3. 3Radiology, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea, Republic Of Korea
  4. 4Neurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seoul, Korea, Republic Of Korea
  5. 5Neurosurgery, Seoul National University College of Medicine, Seoul, Korea, Republic Of Korea

Abstract

Background Stents have widened the indications of endovascular intervention for the cerebral aneurysms.

Purpose We aimed to elucidate the effect of stents on radiologic outcomes and to analyze the risk factors for aneurysmal recanalization via a propensity score matching.

Methods Among 735 aneurysms treated with coil embolization with stents (n = 187) and without stents (n = 548) during the years 2009 to 2011, 157 propensity score-matched pairs of cases were selected. Recanalization rates and relevant risk factors were analyzed. The mean follow-up interval was 24.1 ± 11.3 months (range, 6–48 months) and 22.9 ± 11.4 months (range, 6–56 months) in the stent and the non-stent groups, respectively (P = 0.388).

Results The stent group demonstrated lower recanalization rates than the non-stent group in both the 6-month (1.9% vs 10.2%, P = 0.004) and the final follow-up periods (8.3% vs 18.5%, P = 0.005). In the multivariate analysis, significant factors for recanalization included the use of stents (hazard ratio 0.40, 95% confidence interval 0.21–0.76, P = 0.005), larger aneurysm size (hazard ratio 1.21, 95% confidence interval 1.11–1.31, P < 0.001), and initially incomplete occlusion (hazard ratio 2.39, 95% confidence interval, 1.28–4.43, P = 0.006).

Conclusion In this propensity score-matched analysis, stent implantation reduced recanalization of the coiled cerebral aneurysms.

Abstract P-019 Table 1

Angiographic results in the propensity score-matched analysis

Disclosures H. Kang: None. W. Cho: None. H. Hong: None. J. Kim: None. Y. Cho: None. O. Kwon: None. J. Bang: None. G. Hwang: None. Y. Son: None. C. Oh: None. M. Han: None.

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