title: Sample size and power.
abstract: A quick review of the basics of sample size and power is presented. Readers can participate in an online exercise that introduces them to a power calculator that can be used in their practice, and illustrates the concepts discussed in the article.
authors.affiliation: Department of Infection Prevention and Control, Westchester Medical Center, Valhalla, NY 10595, USA. HaasJ@wcmc.com
authors.forename: Janet P
authors.initials: JP
authors.lastname: Haas
mesh_terms: D003627:Data Interpretation, Statistical; D006801:Humans; D015233:Models, Statistical; D011336:Probability; D012107:Research Design; D018401:Sample Size; D012984:Software