rats: Rats data
In frailtyHL: Frailty Models via Hierarchical Likelihood
Description
Usage
Format
References
Description
Rats data set presented by Mantel et al. (1977) is based on a tumorigenesis study of 50 litters of
female rats. For each litter, one rat was selected to receive the drug and the other two rats were
placebo-treated controls. The survival time is the time to the development of tumor, measured in
weeks. Death before occurrent of tumor yields a right-censored observation; 40 rats developed a
tumor, leading to censoring of about 73 percent.
Usage
1
data("rats")
Format
A data frame with 150 observations on the following 4 variables.
litterLitter number for 50 female rats
rxTreatment(1=drug, 0=placebo)
timeTime to the devlopment of tumor in weeks
statusCensoring indicator(1=uncensored, 0=censored)
References
Mantel,N., Bohidar N. R. and Ciminera, J. L. (1977). Mantel-Haenszel analyses of litter-matched
time-to-response data, with modifications for recovery of interlitter information. Cancer Research,
37, 3863-3868.
Therneasu, T. (2012). survival: survival analysis, including penalised likelihood. http://CRAN.Rproject.
org/package=survival. R pakcage version 2.36-14.
frailtyHL documentation built on Dec. 1, 2019, 1:25 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Description Usage Format References
Description
Rats data set presented by Mantel et al. (1977) is based on a tumorigenesis study of 50 litters of female rats. For each litter, one rat was selected to receive the drug and the other two rats were placebo-treated controls. The survival time is the time to the development of tumor, measured in weeks. Death before occurrent of tumor yields a right-censored observation; 40 rats developed a tumor, leading to censoring of about 73 percent.
Usage
1 | data("rats")
|
Format
A data frame with 150 observations on the following 4 variables.
litterLitter number for 50 female rats
rxTreatment(1=drug, 0=placebo)
timeTime to the devlopment of tumor in weeks
statusCensoring indicator(1=uncensored, 0=censored)
References
Mantel,N., Bohidar N. R. and Ciminera, J. L. (1977). Mantel-Haenszel analyses of litter-matched time-to-response data, with modifications for recovery of interlitter information. Cancer Research, 37, 3863-3868.
Therneasu, T. (2012). survival: survival analysis, including penalised likelihood. http://CRAN.Rproject. org/package=survival. R pakcage version 2.36-14.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.