volume 91, issue 3, P326-330 2016
DOI: 10.1590/abd1806-4841.20165254
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Abstract: BackgroundIn this paper, the basic elements related to the selection of participants for a health research are discussed. Sample representativeness, sample frame, types of sampling, as well as the impact that non-respondents may have on results of a study are described. The whole discussion is supported by practical examples to facilitate the reader's understanding.ObjectiveTo introduce readers to issues related to sampling.