samplesizeRiskRatioExactEquiv {lrstat} | R Documentation |
Sample size for exact unconditional test of equivalence in risk ratio
Description
Obtains the sample size given power for exact unconditional test of equivalence in risk ratio.
Usage
samplesizeRiskRatioExactEquiv(
beta = NA_real_,
riskRatioLower = NA_real_,
riskRatioUpper = NA_real_,
pi1 = NA_real_,
pi2 = NA_real_,
allocationRatioPlanned = 1,
alpha = 0.05
)
Arguments
beta |
The type II error. |
riskRatioLower |
The lower equivalence limit of risk ratio. |
riskRatioUpper |
The upper equivalence limit of risk ratio. |
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 significance level for each of the two one-sided tests. Defaults to 0.05. |
Value
A data frame with the following variables:
-
alpha
: The specified significance level for each of the two one-sided tests. -
attainedAlpha
: The attained significance level. -
power
: The power. -
n
: The sample size. -
riskRatioLower
: The lower equivalence limit of risk ratio. -
riskRatioUpper
: The upper equivalence limit of risk ratio. -
pi1
: The assumed probability for the active treatment group. -
pi2
: The assumed probability for the control group. -
riskRatio
: The risk ratio. -
allocationRatioPlanned
: Allocation ratio for the active treatment versus control. -
zstatRiskRatioLower
: The efficacy boundaries on the z-test statistic scale for the one-sided null hypothesis on the lower equivalence limit. -
zstatRiskRatioUpper
: The efficacy boundaries on the z-test statistic scale for the one-sided null hypothesis on the upper equivalence limit.
Author(s)
Kaifeng Lu, kaifenglu@gmail.com
Examples
samplesizeRiskRatioExactEquiv(
beta = 0.2, riskRatioLower = 0.7, riskRatioUpper = 1/0.7,
pi1 = 0.85, pi2 = 0.85, alpha = 0.05)