Impacto da mudança do valor da significância estatística de 0,05 para 0,005 nos resultados dos ensaios clínicos randomizados publicados em anestesia: estudo transversal

Authors

DOI:

https://doi.org/10.28998/rpss.v12iunico.15901

Abstract

Background and objective: The lack of reproducibility of the results of randomized clinical trials (RCTs) has been questioned in recent years as a sense of multifactorial causation, but greater importance has been given to statistical significance. The aim of this research was to describe the impact of changing the statistical significance value to 0.005 on the results of published clinical trials in anesthesia.

Method: Randomly selected data from original articles of RCTs published in the Brazilian Journal of Anesthesioligy were selected. The primary variable was the frequency of studies that maintained statistical significance after changing the p value to 0.005. The results of this research were compared with data from the literature using the chi-square of adherence, with a significance level of 5% and statistical power of 80% using the BioEstat 5.0 application

Result: Data from 73 RCT articles were analyzed. All used 0.05 as the level of statistical significance and 61.7% (45/73) showed a statistically significant difference at the time of inclusion in this research. The frequency of RCTs that maintained statistical significance after changing the p value from 0.05 to 0.005 was 55.5% (25/45), with no difference with data from the literature (p = 0.5428).

Conclusion: Changing the significance level from 0.05 to 0.005 would lead to a revision in the conclusions of 44.5% published RCTs on anesthesia. The survey identified errors in basic statistics. The greater reproducibility of RCTs may not occur after changing the significance level due to flaws in the use of basic statistics.

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Author Biography

Fabiano Timbó Barbosa, Centro Universitário Tiradentes

Médico formado pela Universidade Estadual de Ciências da Saúde de Alagoas em 1999 e especialista em Anestesiologia com pós-graduação a nível de doutorado em Ciências da Saúde

Published

2026-03-10

How to Cite

Barbosa, F. T. (2026). Impacto da mudança do valor da significância estatística de 0,05 para 0,005 nos resultados dos ensaios clínicos randomizados publicados em anestesia: estudo transversal. Revista Portal: Saúde E Sociedade, 12(unico). https://doi.org/10.28998/rpss.v12iunico.15901