Sample Size Power Calculation Survival Analysis
Introduction & Importance
Sample size power calculation survival analysis is a critical process in designing clinical trials…
How to Use This Calculator
- Enter the desired significance level (α).
- Enter the desired power.
- Enter the median survival time.
- Enter the standard deviation.
- Choose the ratio of the two groups.
- Click ‘Calculate’.
Formula & Methodology
The calculation is based on the following formula…
Real-World Examples
Data & Statistics
| Power | α | 1:1 | 2:1 | 3:1 |
|---|
Expert Tips
- Consider using a higher power for rare diseases.
- Be mindful of the trade-off between power and sample size.
Interactive FAQ
What is power in survival analysis?
Power is the probability that a test will reject the null hypothesis when the alternative hypothesis is true…