lgrkPower: Unstratified (ordinary) logrank power
In EricSLeifer/factorial2x2: Design and Analysis of 2x2 Factorial Trial
Description
Usage
Arguments
Details
Value
Author(s)
References
Examples
Description
Computes the power for the unstratified (ordinary) logrank statistic
for two group comparison.
Usage
1
lgrkPower(hr, nevent, alpha = 0.05, rprob = 0.5)
Arguments
hr
hazard ratio
nevent
expected number of events
alpha
two-sided significance level
rprob
randomization probability
Details
Uses the formula at the bottom of p.317 from Schoenfeld (Biometrika, 1981)
where the beta should be 1 - beta.
Value
power
logrank power
Author(s)
Eric Leifer, James Troendle
References
Schoenfeld, D. The asymptotic properties of nonparametric tests for comparing
survival distributions. Biometrika. 1981; 68: 316-319.
Examples
1
2
3
4
5
hr <- 0.5
nevent <- 98
lgrkPower(hr, nevent, alpha = 0.05, rprob = 0.5)
# $power
# [1] 0.9293463
EricSLeifer/factorial2x2 documentation built on April 24, 2020, 4:27 a.m.
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Description Usage Arguments Details Value Author(s) References Examples
Description
Computes the power for the unstratified (ordinary) logrank statistic for two group comparison.
Usage
1 | lgrkPower(hr, nevent, alpha = 0.05, rprob = 0.5)
|
Arguments
hr |
hazard ratio |
nevent |
expected number of events |
alpha |
two-sided significance level |
rprob |
randomization probability |
Details
Uses the formula at the bottom of p.317 from Schoenfeld (Biometrika, 1981) where the beta should be 1 - beta.
Value
power |
logrank power |
Author(s)
Eric Leifer, James Troendle
References
Schoenfeld, D. The asymptotic properties of nonparametric tests for comparing survival distributions. Biometrika. 1981; 68: 316-319.
Examples
1 2 3 4 5 | hr <- 0.5
nevent <- 98
lgrkPower(hr, nevent, alpha = 0.05, rprob = 0.5)
# $power
# [1] 0.9293463
|
R Package Documentation
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We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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