samplesizeRiskDiffExact {lrstat}R Documentation

Sample size for exact unconditional test of risk difference

Description

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

Usage

samplesizeRiskDiffExact(
  beta = NA_real_,
  riskDiffH0 = 0,
  pi1 = NA_real_,
  pi2 = NA_real_,
  allocationRatioPlanned = 1,
  alpha = 0.025
)

Arguments

beta

The type II error.

riskDiffH0

The risk difference under the null hypothesis. Defaults to 0.

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.

Value

A data frame with the following variables:

Author(s)

Kaifeng Lu, kaifenglu@gmail.com

Examples


samplesizeRiskDiffExact(beta = 0.2, riskDiffH0 = -0.2,
                        pi1 = 0.8, pi2 = 0.8, alpha = 0.025)


[Package lrstat version 0.2.9 Index]