2011
DOI: 10.1590/s1677-54492011000400001
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Tamanho da amostra em estudos clínicos e experimentais

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Cited by 276 publications
(160 citation statements)
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“…The list of community groups was provided by Secretaria Municipal de Assistência Social [Municipal Department of Social Welfare], totaling 3,694 older people from Community Groups. For the sample calculation held according to Miot (14) , a prevalence of 50% of older people with subjective memory complaints was considered, with 95% confidence, 5% margin of error, and 10% possible losses, totaling a minimum sample of 383 individuals. Statistical analysis was performed with MedCalc, version 16.2.0 (MedCalc Software bvba, Ostend, Belgium, 2016).…”
Section: Methodsmentioning
confidence: 99%
“…The list of community groups was provided by Secretaria Municipal de Assistência Social [Municipal Department of Social Welfare], totaling 3,694 older people from Community Groups. For the sample calculation held according to Miot (14) , a prevalence of 50% of older people with subjective memory complaints was considered, with 95% confidence, 5% margin of error, and 10% possible losses, totaling a minimum sample of 383 individuals. Statistical analysis was performed with MedCalc, version 16.2.0 (MedCalc Software bvba, Ostend, Belgium, 2016).…”
Section: Methodsmentioning
confidence: 99%
“…Para o cálculo do tamanho da amostra, utilizou-se a fórmula para estudos transversais com população finita (5) . Foram considerados como parâmetros o coeficiente de confiança de 95% (1,96), o erro amostral de 3% e população de 4500 adolescentes (10 a 19 anos) (N=4500), regularmente matriculados em escolas privadas da zona urbana.…”
Section: Metodologiaunclassified
“…Foram excluídos os alunos ausentes no dia destinado à coleta e os que não estavam em jejum. Foi utilizado formulário que contemplava informações sobre dados socioeconômicos, antropométricos e medidas hemodinâmicas, adaptado de outro estudo (5,8) . As informações relacionadas ao peso foram processadas em kg, precisão de 100g, em balanças modelo Family BWF; a estatura aferida em cm, precisão de 1mm, em estadiômetro portátil afixado à parede lisa e sem rodapé.…”
Section: Metodologiaunclassified
“…3 Sample size calculations are also influenced by the underlying data distribution. 4 Many biomedical data have non-normal distributions, especially those representing events with great variability, with a standard deviation greater than half of the mean value ( Figure 2); which contraindicates the use of statistical techniques appropriate for normal samples, which would risk introducing bias to parameters and to the inferences of tests. 2,5 Even increasing the sample size cannot correct the estimation errors caused by using analytical techniques that are not suited to the data distribution.…”
mentioning
confidence: 99%