Imputation is beneficial for handling missing data in predictive models

Gorelick, 2006, Bias arising from missing data in predictive models, J Clin Epidemiol, 59, 1115, 10.1016/j.jclinepi.2004.11.029

Little, 1987

Vach, 1998, Missing data in epidemiologic studies

Royston, 2006, Dichotomizing continuous predictors in multiple regression: a bad idea, Stat Med, 25, 127, 10.1002/sim.2331