cancer_in_dogs {openintro}

Cancer in dogs

Description

A study in 1994 examined 491 dogs that had developed cancer and 945 dogs as a control group to determine whether there is an increased risk of cancer in dogs that are exposed to the herbicide 2,4-Dichlorophenoxyacetic acid (2,4-D).

Usage

cancer_in_dogs

Format

A data frame with 1436 observations on the following 2 variables.

order

a factor with levels 2,4-D and no 2,4-D

response

a factor with levels cancer and no cancer

Source

Hayes HM, Tarone RE, Cantor KP, Jessen CR, McCurnin DM, and Richardson RC. 1991. Case- Control Study of Canine Malignant Lymphoma: Positive Association With Dog Owner's Use of 2, 4- Dichlorophenoxyacetic Acid Herbicides. Journal of the National Cancer Institute 83(17):1226-1231.

Examples

table(cancer_in_dogs)