Power calculator for Survival analysis (logrank test)

Input
Required alpha level (P):
Observed Survival rate Group 1:
Observed Survival rate Group 2:
Sample size in group 1:
Sample size in group 2:

How to cite this page

MedCalc Software Ltd. Power calculator for Survival analysis (logrank test) | MedCalc. https://www.medcalc.org/en/calc/power-survival-analysis.php (Version 23.6.1; accessed July 14, 2026)

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