bbdm: Benign Breast Disease Matched study data

Description

Benign Breast Disease Matched study data

Arguments

Format

A data.frame with \(200\) observations (rows) and \(14\) variables (columns).

Details

The relationship between the use of oral contraceptives and fibrocystic breast disease was examined in a hospital-based case-control study undertaken in New Haven, Connecticut, from 1977 to 1979.

This is a subset of the original dataset.

Columns are:

STR

stratum \(1-50\)).

OBS

observation within stratum (a factor):

1: Case
2-4: Control

AGMT

Age (years) at interview.

FNDX

Final diagnosis (a factor):

0: Control
1: Case

HIGD

Highest grade in school. \(5-20\).

DEG

Degree (a factor):

0: none
1: high_school
2: junior_college
3: college
4: masters
5: doctoral

CHK

Regular medical checkups? (a factor):

1: Yes
2: No

AGP1

Age (years) at first pregnancy.

AGMN

Age (years) at menarche.

NLV

Non-live 'births'. Number of stillbirths, miscarraiges etc. \(0-7\).

LIV

Number of live births. \(0-11\).

WT

Weight (lbs) at time of interview.

AGLP

Age (years) at last menstrual period.

MST

Marital status (factor):

1: married
2: divorced
3: separated
4: widowed
5: never_married

References

Pastides H, Kelsey JL, LiVolsi VA, Holford TR, Fischer DB, Goldenberg IS 1983. Oral contraceptive use and fibrocystic breast disease with special reference to its histopathology. Journal of the National Cancer Institute 71(1):5--9. 10.1093/jnci/71.1.5

Pastides H, Kelsey JL, Holford TR, LiVolsi VA 1985. The epidemiology of fibrocystic breast disease with special reference to its histopathology. American Journal of Epidemiology 121(3):440--447. 10.1093/oxfordjournals.aje.a114016