Application of resampling techniques to improve the quality of survival analysis risk curves for human frontal bone fracture

Clinical Biomechanics
Nicholas DeVogelN Yoganandan

Abstract

In automotive events, head injuries (skull fractures and/or brain injuries) are associated with head contact loading. While the widely-used head injury criterion is based on frontal bone fracture and linear accelerations, injury risk curves were not developed from original datasets. Develop skull fracture-based risk curves for using previously published data and apply resampling techniques to assess their qualities. Force, deflection, energy, and stiffness data from thirteen human cadaver head impact tests were used to develop risk curves using parametric survival analysis. Injuries occurred to all specimens. Data points were treated as uncensored. Variables were ranked, and the variable best explaining the underlying fracture response was determined using the Brier Score Metric (BSM). The qualities of the risk curves were determined using normalized confidence interval sizes. Statistical resampling methods were used to assess the quality of the risk curves and the impact of the sample size by conducting 2000 simulations. Sample sizes ranged from 13 to 26. The Weibull distribution was optimal for all the response variables, except deflection (log-logistic). The quality of the risk curves was the highest for deflection. This var...Continue Reading

Citations

Oct 3, 2019·Annals of Biomedical Engineering·Narayan YoganandanJiangYue Zhang
Aug 28, 2020·Frontiers in Bioengineering and Biotechnology·Anjishnu BanerjeeNarayan Yoganandan
Apr 14, 2020·Journal of the Mechanical Behavior of Biomedical Materials·Narayan YoganandanDavid Barnes

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