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• W2807919833 abstract "Imputation procedures in biomedical fields have turned into statistical practice, since further analyses can be conducted ignoring the former presence of missing values. In particular, non-parametric imputation schemes like the random forest or a combination with the stochastic gradient boosting have shown favorable imputation performance compared to the more traditionally used MICE procedure. However, their effect on valid statistical inference has not been analyzed so far. This paper closes this gap by investigating their validity for inferring mean differences in incompletely observed pairs while opposing them to a recent approach that only works with the given observations at hand. Our findings indicate that machine learning schemes for (multiply) imputing missing values may inflate type-I-error or result in comparably low power in small to moderate matched pairs, even after modifying the test statistics using Rubin's multiple imputation rule. In addition to an extensive simulation study, an illustrative data example from a breast cancer gene study has been considered." @default.
• W2807919833 created "2018-06-21" @default.
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• W2807919833 date "2018-06-18" @default.
• W2807919833 modified "2023-09-27" @default.
• W2807919833 title "A cautionary tale on using imputation methods for inference in matched pairs design" @default.
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• W2807919833 hasPublicationYear "2018" @default.
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