PharmaSchool Sample Size Calculator

Type: Continuous Data Superiority/Difference

The calculator below is to determine the sample size for a 2 arm, randomised, parallel group trial with the outcome variable being continuous. For example: height, weight, blood pressure. The sample size shown will be the number of subjects needed to detect a difference between two groups in the outcome variable.

HELP: If you would like help in completing the sample size calculation click help on. Help On
Type		Continuous Normally Distributed Data
Design		Parallel Group
Objective		Difference/Superiority
Effect Size	(a)	(numerical values only)
Significance Level (%)	(b)	% (usually 5%)
Standard Deviation	(c)	(numerical values only)
Desired Power Level	(d)	%
Withdrawal/Non-evaluable rate	(e)	%

Binary Difference | Binary Non-inferiority | Continuous Difference