rats: Rat Data
In mdhglm: Multivariate Double Hierarchical Generalized Linear Models
Description
Usage
Format
References
Description
The 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. Here each litter is treated as a cluster. The survival
time is the time to development of tumor, measured in weeks.
Death before occurrence of tumor yields a right-censored observation;
forty rats developed a tumor, leading to censoring of about 73 percent.
Usage
1
data("rats")
Format
A data frame with 300 observations on the following 5 variables.
littercluster number for 50 litters
rxtratment (1=drug, 0=placebo)
timetime to development of tumor, measured in weeks
statusstatus (1=occurrence of event, 0=censoring)
sexa factor with levels f (female) and m (male)
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.
mdhglm documentation built on May 2, 2019, 5:52 a.m.
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Description Usage Format References
Description
The 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. Here each litter is treated as a cluster. The survival time is the time to development of tumor, measured in weeks. Death before occurrence of tumor yields a right-censored observation; forty rats developed a tumor, leading to censoring of about 73 percent.
Usage
1 | data("rats")
|
Format
A data frame with 300 observations on the following 5 variables.
littercluster number for 50 litters
rxtratment (1=drug, 0=placebo)
timetime to development of tumor, measured in weeks
statusstatus (1=occurrence of event, 0=censoring)
sexa factor with levels
f(female) andm(male)
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.
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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