polyps3 {HSAUR} | R Documentation

## Familial Andenomatous Polyposis

### Description

Data from a placebo-controlled trial of a non-steroidal anti-inflammatory drug in the treatment of familial andenomatous polyposis (FAP).

### Usage

    data("polyps3")

### Format

A data frame with 22 observations on the following 5 variables.

`sex`
  a factor with levels `female` and `male`.
`treatment`
  a factor with levels `placebo` and `active`.
`baseline`
  the baseline number of polyps.
`age`
  the age of the patient.
`number3m`
  the number of polyps after three month.

### Details

The data arise from the same study as the `polyps` data. Here, the number of polyps after three months are given.

### Source

F. M. 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 sulindac in familial adenomatous polyposis. New England Journal of Medicine, 328(18), 1313–1316.

S. Piantadosi (1997), Clinical Trials: A Methodologic Perspective. John Wiley & Sons, New York.

### Examples

      data("polyps3", package = "HSAUR")
      plot(number3m ~ age, data = polyps3, pch = as.numeric(polyps3$treatment))
      legend("topright", legend = levels(polyps3$treatment), pch = 1:2, bty = "n")

[Package HSAUR version 1.2-3 Index]