En este estudio se enfatiza la importancia de efectuar una estimación del tamaño muestral al emprender una investigación biomédica. Los escenarios más comúnmente encontrados son analizados y se discuten los procedimientos apropiados para establecer tamaños muestrales en estudios de prevalencia, promedios, proporciones, pruebas diagnósticas, concordancia, cohortes y caso-control
This study emphasises the importance of carrying out an estimation of sample size when beginning a biomedical investigation. The most common settings encountered are analised and a discussion of the appropriate methods to determine sample sizes in studies of prevalence, averages, proportions, diagnostic tests, concordance, cohorts and case-control
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