Two Arm Expected Events

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').

For further details, view the Help Document.

User Input

Program Output

Select Type of Calculation

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

Input: Hazard or Survival Probability

Input hazard rate
Input median survival
Input survival probability at time t

Sample Size

Proportion in Standard Group

Accrual Time

Follow-up Time after Accrual Period

Analysis Time

Proportion of Total Events at Analysis Time

Select Time Unit for Input
Month Year

Control Arm:

Proportion Cured

Hazard Rate

Survival Probability

at Time

Median Survival

Experimental Arm:

Proportion Cured

Hazard Rate

Survival Probability

at Time

Median Survival

Help Document