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Researchers frequently use automated model selection methods such as backwards elimination to identify variables that are independent predictors of an outcome under consideration. We propose using bootstrap resampling in conjunction with automated variable selection methods to develop parsimonious prediction models. Using data on patients admitted to hospital with a heart attack, we demonstrate that selecting those variables that were identified as independent predictors of mortality in at least 60%% of the bootstrap samples resulted in a parsimonious model with excellent predictive ability.
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Peter C. Austin
Jack V. Tu
The American Statistician
University of Toronto
Sunnybrook Health Science Centre
Institute for Clinical Evaluative Sciences
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Austin et al. (Sat,) studied this question.
www.synapsesocial.com/papers/69d7da3e05ee2ba81dbee5dc — DOI: https://doi.org/10.1198/0003130043277