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.
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+ |