Resumo

CORTES CORTES, Manuel E.; MUR VILLAR, Norma; IGLESIAS LEON, Miriam  e  CORTES IGLESIAS, Manuel. Some considerations for the calculation of the sample size in Medical Sciences research. Medisur [online]. 2020, vol.18, n.5, pp. 937-942.  Epub 02-Out-2020. ISSN 1727-897X.

The objective of this paper is to reflect some considerations on the use of sampling in health sciences, based on the need for professionals in these sciences to familiarize themselves with scientific research in their area of knowledge, from a scientific perspective, that makes it possible to investigate the health problems that are constantly developing. The process of Permanent and Continuous Training and Improvement of professionals, as a principle of Medical Education, is articulated with that of Teaching - Assistance and research, the search and treatment of information in this area of scientific knowledge, requires of a statistical study that emerges the quality from the quantitative analysis, for this, it is important to consider that in all studies of this magnitude, the total population becomes very cumbersome, expensive and slow, so sampling techniques should be used to Obtain meaningful information with the use of less resources and less time. The sampling formula for known mean and variance is presented, a technique is given to find the number of elements of the initial sample when there is no prior knowledge of mean and variance, simple random sampling of proportions with the probabilities of success is studied and failure p and q respectively, explaining the case when you have p = q = 0.5 to obtain a maximum sample size.

Palavras-chave : sample size; sampling studies; biomedical research; simple random sampling.

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