Non-parametric approach for calculation of sample size based on questionnaires or scales of assessment in the health care / Abordagem não-paramétrica para cálculo do tamanho da amostra com base em questionários ou escalas de avaliação na área de saúde

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This text suggests how to calculate a sample size based on the use of a data collection instrument consisting of categorical items. The arguments for this suggestion are based on theories of Combinatorics and Paraconsistency. The purpose is to suggest a practical and simple calculation procedure to obtain an acceptable sample size to collect information, organize it and analyze data from an application of an instrument for collecting medical data, based exclusively on discrete items (categorical items), i.e., each item of the instrument is considered as a non-parametric variable with finite number of categories. In the health care it is very common to use survey instruments on the basis of such items: clinical protocols, hospital registers, questionnaires, scales and other tools for hearing consider a sequence of items organized categorically. A formula for calculating the sample size was proposed for a population of unknown size, and an adjusted formula has been proposed for population of known size. It was seen, with practical examples, the possibility of using both formulas, allowing to consider the practicality of the use in cases that have little or no information available about the population from which the sample is collected

ASSUNTO(S)

matemática saúde tamanho da amostra coleta de dados mathematics health data collection amostragem nonparametric statistics estatística não paramétrica lógica sample studies logic sample size

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