bdendo {Epi}

A case-control study of endometrial cancer

Description

The bdendo data frame has 315 rows and 13 columns, bdendo11 126 rows. These data concern a study in which each case of endometrial cancer was matched with 4 controls. bdendo11 is a 1:1 mathed subset of bdendo. Matching was by date of birth (within one year), marital status, and residence.

Format

These data frames have the following columns:

set:	Case-control set: a numeric vector
d:	Case or control: a numeric vector (1=case, 0=control)
gall:	Gall bladder disease: a factor with levels No Yes.
hyp:	Hypertension: a factor with levels No Yes.
ob:	Obesity: a factor with levels No Yes.
est:	A factor with levels No Yes.
dur:	Duration of conjugated oestrogen therapy: a factor with levels 0, 1, 2, 3, 4.
non:	Use of non oestrogen drugs: a factor with levels No Yes.
duration:	Months of oestrogen therapy: a numeric vector.
age:	A numeric vector.
cest:	Conjugated oestrogen dose: a factor with levels 0, 1, 2, 3.
agegrp:	A factor with levels 55-59 60-64 65-69 70-74 75-79 80-84
age3:	a factor with levels <64 65-74 75+

Source

Breslow NE, and Day N, Statistical Methods in Cancer Research. Volume I: The Analysis of Case-Control Studies. IARC Scientific Publications, IARC:Lyon, 1980.

Examples

data(bdendo)
str(bdendo)