Liver related laboratory data from a randomized, blind, parallel group clinical trial with 4 doses of a drug.
data(liver)
A data frame with 606 observations on the following 9 variables.
Alkaline phosphatase at baseline. A numeric vector.
Alanine aminotransferase at baseline. A numeric vector.
Aspartate aminotransferase at baseline. A numeric vector.
Total bilirubin at baseline. A numeric vector.
Alkaline phosphatase after treatment. A numeric vector.
Alanine aminotransferase after treatment. A numeric vector.
Aspartate aminotransferase after treatment. A numeric vector.
Total bilirubin after treatment. A numeric vector.
The treatment group (i.e. dose group). A factor with levels A
B
C
D
Dose A is the lowest dose, dose, B the next, C the next, and D the highest dose. The baseline values were taken prior to any treatment being received, and the clinical trial had a single post-baseline visit.