Sample Size Calculation Guide - Part 3: How to Calculate the Sample Size for an Independent Case-control Study

Journal Title: Advanced Journal of Emergency Medicine - Year 2019, Vol 3, Issue 2

Abstract

In the previous educational articles, we explained how to calculate the sample size for a rate or a single proportion and how to calculate the sample size for an independent cohort study. In this article, we will explain how to calculate the sample size for an independent case-control study based on the odds ratios or two proportions representing the exposure rates in the case and the control groups.

Authors and Affiliations

Nadien Khaled Fahim, Ahmed Negida

Keywords

Related Articles

Atypical Presentation of Acute Appendicitis: A 32-year-old Man with Gastroenteritis Symptoms; an Educational Case

Introduction: Appendicitis is a common condition that almost always requires emergency surgery. The diagnosis is clear when the patient presents with classic symptoms. However, presentation may be variable due to variati...

Extranodal Natural Killer/T-cell Lymphoma in a Child with a Prior History of Nasal Trauma: a Case Report

Introduction: Facial lesions usually have a benign self-limited prognosis, but in rare cases they have a poor outcome. Extranodal natural killer/T-cell lymphoma (ENK/TCL) is a rare aggressive lesion presenting with a mid...

Iranian Emergency Medical Service Response in Disaster; Report of three Earthquakes

Introduction: The earthquake is one of the most natural catastrophic crises that can cause a lot of casualties. Considering an earthquake-prone country, Iran is ranked as one of the world's most dangerous countries. Obje...

Educational Intervention Effect on Pain Management Quality in Emergency Department; a Clinical Audit

Introduction: Pain is a frequent complaint of patients who are referred to the emergency department (ED), which is ignored or mismanaged and, almost always, approached in terms of determining the cause of pain instead of...

Flight Attendant’s Perspective on the Medical Professional’s Presence During In-Flight Cardiopulmonary Resuscitation

About 95% of the two billion airlines passengers suffered from health issues (1). Furthermore, a call center in North Carolina noted that there were 16 in-flight emergency cases for every 1 million airlines passengers (2...

Download PDF file
  • EP ID EP486080
  • DOI 10.22114/ajem.v0i0.138
  • Views 128
  • Downloads 0

How To Cite

Nadien Khaled Fahim, Ahmed Negida (2019). Sample Size Calculation Guide - Part 3: How to Calculate the Sample Size for an Independent Case-control Study. Advanced Journal of Emergency Medicine, 3(2), -. https://europub.co.uk/articles/-A-486080