powerRiskRatioExact {lrstat}R Documentation

Power for exact unconditional test of risk ratio

Description

Obtains the power given sample size for exact unconditional test of risk ratio.

Usage

powerRiskRatioExact(
  n = NA_integer_,
  riskRatioH0 = 1,
  pi1 = NA_real_,
  pi2 = NA_real_,
  allocationRatioPlanned = 1,
  alpha = 0.025,
  calculateAttainedAlpha = 1L
)

Arguments

n

The total sample size.

riskRatioH0

The risk ratio under the null hypothesis. Defaults to 1.

pi1

The assumed probability for the active treatment group.

pi2

The assumed probability for the control group.

allocationRatioPlanned

Allocation ratio for the active treatment versus control. Defaults to 1 for equal randomization.

alpha

The one-sided significance level. Defaults to 0.025.

calculateAttainedAlpha

Whether to calculate the attained alpha.

Value

A data frame with the following variables:

Author(s)

Kaifeng Lu, kaifenglu@gmail.com

Examples


powerRiskRatioExact(n = 68, pi1 = 0.6, pi2 = 0.25, alpha = 0.05)


[Package lrstat version 0.2.9 Index]