Expected Events (2 Arm)

This program calculates the expected number of events for a planned study. It allows the user to specify a follow-up period after the close of study accrual. The program default presents a table of results. Alternatively, user can calculate the expected proportion of events at a given time, or the time at which a given proportion of events have occurred. The program will allow the user to specify a percentage of patients that have no risk ('Cures').

User Input
Program Output

Select Type of Calculation

Make a table of expected event information
Calculate analysis time for a given proportion of total events
Calculate expected events for a given analysis time

Input: Hazard or Survival Probability

Input survival probability at time t
Input hazard rate

Sample Size
Accrual Time
Follow-up Time after Accrual Period
Select Time Unit
Month Year
Control Arm:

Survival Probability at Time
Experimental Arm:

Survival Probability at Time