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StatsToDo : Sample Size for Survival (Kaplan Meier Log Rank Test) Program

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Related link :
Sample Size Introduction and Explanation Page
Survival - Kaplan Meier Log Rank Test Explained Page
Sample Size for Survival (Kaplan Meier Log Rank Test) Explained and Tables Page

Program References

Sample Size :
Power : 		The Data for Sample Size Calculations is in 5 columns.
   - Each row a separate study
   - Col 1 = probability of Type I error (α)
   - Col 2 = power (1-β)
   - Col 3 = survival rate in grp 1
   - Col 4 = survival rate in grp 2
   - Col 5 = ratio of sample size in grp 1 / sample size in grp 2 (ssiz1/ssiz2)

The Data for Power Estimations is in 5 columns.
   - Each row a separate study
   - Col 1 = probability of Type I error (α)
   - Col 2 = sample size in group 1
   - Col 3 = Survival rate observed in group 1
   - Col 4 = sample size in group 2
   - Col 5 = Survival rate observed in group 2

Please Note: Any survival rate of 0 is defaulted to 0.0001 and 1 to 0.9999
to produce an approximate result.