+-----------+-------------------+
| polyps3   | R Documentation   |
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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), 1313â€“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")

