Sample size calculation in medical studies

• Published in: Gastroenterology and hepatology from bed to bench Vol. 6; no. 1; pp. 14 - 17
• Main Authors: Pourhoseingholi, Mohamad Amin, Vahedi, Mohsen, Rahimzadeh, Mitra
• Format: Journal Article
• Language: English
• Published: Iran Research Institute for Gastroenterology and Liver Diseases 2013
• Subjects: Special; Sample size; Medical studies

Optimum sample size is an essential component of any research. The main purpose of the sample size calculation is to determine the number of samples needed to detect significant changes in clinical parameters, treatment effects or associations after data gathering. It is not uncommon for studies to...