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

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

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

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

Sample Size Calculation Guide - Part 6: How to calculate the sample size for a non-inferiority or an equivalence clinical trial

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, and for a superiority clinical trial. In this article, we will explain how to calculate the sample size for a non-inferiority or equivalence clinical trial

Sample Size Calculation Guide - Part 6: How to calculate the sample size for a non-inferiority or an equivalence clinical trial

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, and for a superiority clinical trial. In this article, we will explain how to calculate the sample size for a non-inferiority or equivalence clinical trial

Sample Size Calculation Guide - Part 5: How to calculate the sample size for a superiority clinical trial

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, and for a diagnostic test accuracy study. In this article, we explain how to calculate the sample size for a superiority clinical trial

Sample Size Calculation Guide - Part 5: How to calculate the sample size for a superiority clinical trial

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, and for a diagnostic test accuracy study. In this article, we explain how to calculate the sample size for a superiority clinical trial

Sample Size Calculation Guide - Part 4: How to Calculate the Sample Size for a Diagnostic Test Accuracy Study based on Sensitivity, Specificity, and the Area Under the ROC Curve

In the previous educational articles, we explained how to calculate the sample size for a rate or a single proportion (part 1), for an independent cohort study (part 2), and for an independent case-control study (part 3). In this article, we will explain how to calculate the sample size for a diagnostic test accuracy study based on sensitivity, specificity, or the area under the ROC curve

Sample Size Calculation Guide - Part 4: How to Calculate the Sample Size for a Diagnostic Test Accuracy Study based on Sensitivity, Specificity, and the Area Under the ROC Curve

In the previous educational articles, we explained how to calculate the sample size for a rate or a single proportion (part 1), for an independent cohort study (part 2), and for an independent case-control study (part 3). In this article, we will explain how to calculate the sample size for a diagnostic test accuracy study based on sensitivity, specificity, or the area under the ROC curve

Invitation to the GNS-I Study; a Global Evaluation of Traumatic Brain Injury in Low-, Middle-, and High- income Countries

We invite worldwide neurosurgeons, trauma surgeons, emergency medicine physicians, anaesthesiologists, and trainees to join the GNS team. Any worldwide hospital the receives and manages TBI patients is eligible for participation in the study. Collaborators can register through the official GNS website available here: https://www.globalneurosurg.org/ There are several ways in which collaborators can participate in the GNS team, these roles can be found on the GNS website here: https://www.globalneurosurg.org/collaborator-roles

Sampling Methods in Clinical Research; an Educational Review

Clinical research usually involves patients with a certain disease or a condition. The generalizability of clinical research findings is based on multiple factors related to the internal and external validity of the research methods. The main methodological issue that influences the generalizability of clinical research findings is the sampling method. In this educational article, we are explaining the different sampling methods in clinical research