In this strain of rat, tumors begin to appear about 6 weeks after carcinogen and are followed for another 6 weeks. The goal of the study is to estimate the effects of nicotinamide riboside (a dietary supplement) on growth of mammary gland tumors.
Format
A data frame with 336 rows and 6 variables:
- ID
Mouse identifier to indicate repeated measurements on the same mouse. (factor)
- Cohort
Indicator of which cohort the mouse belonged to, in order to account for potential batch effects. (factor)
- Treatment
Treatment group (factor). VEH = control (vehicle), NR = nicotinamide riboside
- Week
Week of measurment (integer)
- Volume
Tumor volume, in cubic mm (double)
- Number
Number of tumors (integer)