bdendo: A case-control study of endometrial cancer

Description Format Source Examples

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

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Example output

'data.frame':	315 obs. of  13 variables:
 $ set     : Named num  1 1 1 1 1 2 2 2 2 2 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ d       : num  1 0 0 0 0 1 0 0 0 0 ...
 $ gall    : Factor w/ 2 levels "No","Yes": 1 1 1 1 1 1 1 1 1 1 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ hyp     : Factor w/ 2 levels "No","Yes": 1 1 1 1 1 1 1 2 1 1 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ ob      : Factor w/ 2 levels "No","Yes": 2 NA NA NA 2 1 1 2 1 1 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ est     : Factor w/ 2 levels "No","Yes": 2 1 1 1 2 2 2 1 2 2 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ dur     : Ord.factor w/ 5 levels "0"<"1"<"2"<"3"<..: 5 1 1 1 4 5 2 1 4 3 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ non     : Factor w/ 2 levels "No","Yes": 2 1 1 1 2 2 1 2 1 2 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ duration: Named num  96 0 0 0 48 96 5 0 53 45 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ age     : Named num  74 75 74 74 75 67 67 67 67 68 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ cest    : Ord.factor w/ 4 levels "0"<"1"<"2"<"3": 4 1 1 1 2 4 4 1 3 3 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ agegrp  : Factor w/ 6 levels "55-59","60-64",..: 4 4 4 4 4 3 3 3 3 3 ...
  ..- attr(*, "names")= chr  "1" "2" "3" "4" ...
 $ age3    : Factor w/ 3 levels "<64","65-74",..: 2 2 2 2 2 2 2 2 2 2 ...

Epi documentation built on Feb. 28, 2021, 1:06 a.m.

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