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Sample size for Comparison of two ROC curves

Input
Type I error - Alpha: 
Type II error - Beta:
Area under ROC curve 1: 
Area under ROC curve 2: 
Correlation in positive group: 
Correlation in negative group: 
Ratio of sample sizes in negative/positive groups: 
Result
Number of cases required in positive group:
Number of cases required in negative group:
Total sample size (2 groups together):

For details, see the MedCalc manual: Sample size: Comparison of two ROC curves.

How to cite this page

  • MedCalc Software Ltd. Sample size calculator for Comparison of two ROC curves | MedCalc. https://www.medcalc.org/en/calc/sample-size-comparison-of-2-roc-curves.php (Version 23.6.1; accessed July 15, 2026)
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