polyps {GLMsData}

The number of polyps and suldinac

Description

The number of polyps in people with familial adenomatous polyposis, after being given a placebo or a new drug

Usage

data(polyps)

Format

A data frame with 20 observations on the following 3 variables.

Number

the number of polyps; a numeric vector

Treatment

the treatment group; a factor with levels Drug (suldinac), Placebo

Age

the age of the person; a numeric vector

Details

The data give the number of polyps in people with famial adenomatous polyposis, after being given a placebo or a new drug (suldinac).

Source

B. S. Everitt and T. Hothorn (2006) A Handbook of Statistical Analyses Using r Chapman & Hall/crc, Table 6.1.

References

F. N. Giardiello, S. R. Hamilton, A. J. Krush, S. Piantadosi, L. M. Hylind, P. Celano, S. V. Booker, C. R. Robinson, and G. J. A. Offerhaus (1993) Treatment of colonic and rectal adenomas with suldindac in famial adenomatous polyposis, New England Journal of Medicine, 328(18), 1313–1316.

S. Piantadosi (1997) Clinical trials: A methodologic perspective, New York: John Wiley and Sons.

Examples

data(polyps)
coplot( Number ~ Age | Treatment, data=polyps )