Learning curve in pipeline embolization device: results from the pipeline embolization device in China post-market multicentre registry study.

Although the association with fewer major complications did not reach statistical significance, group 3, with increased operator experience, was still associated with a decreased risk of poor functional outcomes at discharge (odds ratio=0.064, 95% CI=0.005–0.813, P =0.034, P for trend=0.03).

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Baseline demographics between different surgical groups appeared similar, except for a decreasing trend in aneurysm size in the surgical group with more operator experience.

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