ACF: Aberrant Crypt Foci in Rat Colons
| ACF | R Documentation |
Aberrant Crypt Foci in Rat Colons
Description
Numbers of aberrant crypt foci (ACF) in colons of 66 rats subjected to a various numbers of dose of the carcinogen azoxymethane (AOM), sacrificed at 3 different times.
Usage
ACFFormat
This data frame contains the following columns:
- INJ
The number of carcinogen injections
- T
Time of sacrifice, in weeks following injection of AOM
- COUNT
The number of ACF observed in each rat colon
Source
Ranjana P. Bird, Faculty of Human Ecology, University of Manitoba, Winnipeg, Canada.
References
E.A. McLellan, A. Medline and R.P. Bird. Dose response and proliferative characteristics of aberrant crypt foci: putative preneoplastic lesions in rat colon. Carcinogenesis, 12(11): 2093-2098, 1991.
Examples
sapply(split(ACF$COUNT,ACF$T),var)
