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. Author manuscript; available in PMC: 2020 Aug 1.
Published in final edited form as: World Neurosurg. 2019 May 11;128:e884–e894. doi: 10.1016/j.wneu.2019.05.022

Figure 1.

Figure 1.

Variations in the unadjusted thirty-day adverse event rate (and its associated standard error) by A) patient age, B) the number of comorbidities, C) ASA physical classification designation, and D) operative time.