A case-control study of endometrial cancer

Description

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

Format

This data frame contains 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: an ordered 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: an ordered 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

1

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