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.
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+ |