This two-arm survival program assumes both piece-wise exponential survival curves and piece-wise constant accrual over unit intervals.

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User Input

Program Output

Type Calculation

Sample Size

Power

Sided

1 Sided

2 Sided

Alternatives

Simple Hazard Ratio

Varying Hazard Ratios

Proportion in Standard Group

Alpha

Total Accrual

Power

Width of Interval

Number Accrual Intervals

Number Follow-up Intervals

Hazard Ratio

Interval | Proportion Accrual at End of the Interval |
---|

Interval | Hazard Rate, Std. | Hazard Ratio, Std. to Exp. |
---|

Power

Total Accrual