Portal de Periódicos da CAPES

Prediction models need appropriate internal, internal–external, and external validation

2015; Elsevier BV; Volume: 69; Linguagem: Inglês

10.1016/j.jclinepi.2015.04.005

1878-5921

Ewout W. Steyerberg, Frank E. Harrell,

Statistical Methods in Epidemiology

Recent Editorials in this journal stressed the classical paradigm in clinical epidemiology of insisting on test–retest evaluations for studies on diagnosis and prognosis [1] and specifically prediction models [2]. Indeed, independent validation of previous research findings is an important scientific principle.