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

Analysis Time

Select Time Unit Month
Year

Proportion of Total Events

Control Arm:

Survival Probabilityat Time

Experimental Arm:

Survival Probabilityat Time

Control Arm:

Hazard Rate

Experimental Arm:

Hazard Rate

Hazard Rate - Control Arm

Hazard Rate - Experimental Arm

Analysis Time (under the null hypothesis)

Analysis Time (under the alternative hypothesis)

Expected Events Under the Null Hypothesis

Percent of Total Expected Events Under the Null Hypothesis

Expected Events Under the Alternative Hypothesis

Percent of Total Expected Events Under the Alternative Hypothesis