Comprehensive Sample Size Calculation

One of the major limitations in clinical research is the insufficient information provided regarding its sample size calculation. The power of any study is to find the evidence and this cannot be achieved without adequate sample size. The question is how many is considered adequate. In course, we will show you how to calculate the sample size for different clinical research designs using software or online calculator.

“The myth of number 30: The inclusion of 30 patients per group will neither improve your chances to reach dependable results nor decrease the probability to pass-by significant differences” Dr Ahmed Hassouna

Workshop items:

• Basic rules for sample size calculation: 

  • Risks of error in statistics

  • The power of the study

  • The 5 basic requirements

  • The magic number 16

  • Estimation of the power of a published manuscript

  • Effect size versus sample size

  • The non-centrality parameter 

• Effect size & sample size calculation for: 

  • Compare 2 proportions

  • Compare 2 means

  • Survey study

  • Binomial data 

  • Ordered categorical data 

  • Two medians 

  • Multiple means (ANOVA) 

  • Correlation coefficient r & simple regression

  • Multiple linear regression 

  • Logistic regression 

  • Paired design

• Application on G-power software and online calculators