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Validation and updating of risk models based on multinomial logistic regression.

Ben Van CalsterKirsten Van HoordeYvonne VergouweShabnam BobdiwalaGeorge CondousEmma KirkTom BourneEwout W Steyerberg
Published in: Diagnostic and prognostic research (2017)
Methods for updating of multinomial risk models are now available to improve predictions in new settings. A closed testing procedure is helpful to decide whether revision is preferred over recalibration. Because multicategory outcomes increase the number of parameters to be estimated, we recommend full model revision only when the sample size for each outcome category is large.
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