Sample Size Calculation Guide - Part 7: How to Calculate the Sample Size Based on a Correlation

  • Ahmed Negida ORCID Mail Faculty of Medicine, Zagazig University, Zagazig, El-Sharkia, Egypt

Abstract

In the previous educational articles, we explained how to calculate the sample size for a rate or a single proportion, for an independent cohort study, for an independent case-control study, for a diagnostic test accuracy study, for a superiority clinical trial, and for a non-inferiority or equivalence clinical trial. In this article, we will explain how to calculate the sample size for a clinical study with the aim of detecting the correlation coefficient between two variables.

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References

1. Fahim NK, Negida A. Sample size calculation guide - part 1: how to calculate the sample size based on the prevalence rate. Adv J Emerg Med. 2018;2(4):e50.
2. Fahim NK, Negida A. Sample size calculation guide - part 2: how to calculate the sample size for an independent cohort study. Adv J Emerg Med. 2019;3(1);e12.
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Published
2020-02-17
How to Cite
1.
Negida A. Sample Size Calculation Guide - Part 7: How to Calculate the Sample Size Based on a Correlation. Adv J Emerg Med. 4(2):e34.
Section
Educational Notes in Research Methodology and Medical Statistics