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1.4.7 Benign Breast Disease Study

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The Benign Breast Disease Study data set consists of data collected from 200 women in a case–control study designed to investigate the risk factors associated with benign breast disease at two hospitals in New Haven, Connecticut. The variables included in this data set are summarized in Table 1.7.

Table 1.7 A Description of the Variables in the Benign Breast Disease Study Data Set

Variable Description Codes/Values Name
1 Stratum 1–50 STR
2 Observation within a stratum 1 = Case OBS
2–4 = Control
3 Age of the subject at Years AGMT
the interview
4 Final diagnosis 1 = Case FNDX
0 = Control
5 Highest grade in school HIGD
6 Degree 0 = None DEG
1 = High school
2 = Jr. college
3 = College
4 = Masters
5 = Doctoral
7 Regular medical checkups 1 = Yes CHK
2 = No
8 Age at first pregnancy Years AGP1
9 Age at menarche Years AGMN
10 No. of stillbirths, miscarriages, etc. NLV
11 Number of live births LIV
12 Weight of the subject Pounds WT
13 Age at last menstrual period Years AGLP
14 Marital status 1 = Married MST
2 = Divorced
3 = Separated
4 = Widowed
5 = Never married
Applied Biostatistics for the Health Sciences

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