rats2: Rat data from Gail et al.
In survival: Survival Analysis
rats2 R Documentation
Rat data from Gail et al.
Description
48 rats were injected with a carcinogen, and then
randomized to either drug or placebo. The number of tumors ranges
from 0 to 13; all rats were censored at 6 months after randomization.
Usage
rats2
Format
rat: id
trt: treatment,(1=drug, 0=control)
observation: within rat
start: entry time
stop: exit time
status: event status, 1=tumor, 0=censored
Note
The usage above assumes that the survival package is attached via
library(survival) or via another package that depends on
survival, e.g., mstate. If not, then either survival::rats2
can be used or data(cancer, package="survival").
Source
MH Gail, TJ Santner, and CC Brown (1980),
An analysis of comparative carcinogenesis experiments based on
multiple times to tumor.
Biometrics 36, 255–266.
survival documentation built on Sept. 10, 2026, 1:07 a.m.
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| rats2 | R Documentation |
Rat data from Gail et al.
Description
48 rats were injected with a carcinogen, and then randomized to either drug or placebo. The number of tumors ranges from 0 to 13; all rats were censored at 6 months after randomization.
Usage
rats2
Format
| rat: | id |
| trt: | treatment,(1=drug, 0=control) |
| observation: | within rat |
| start: | entry time |
| stop: | exit time |
| status: | event status, 1=tumor, 0=censored |
Note
The usage above assumes that the survival package is attached via
library(survival) or via another package that depends on
survival, e.g., mstate. If not, then either survival::rats2
can be used or data(cancer, package="survival").
Source
MH Gail, TJ Santner, and CC Brown (1980), An analysis of comparative carcinogenesis experiments based on multiple times to tumor. Biometrics 36, 255–266.
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.
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