Applied Biostatistics for the Health Sciences. Richard J. Rossi

Table 1.2 A Description of the Variables in the Body Fat Data Set

Variable	Description	Codes/Values	Name
1	Density determined from	Density	Density
	underwater weighing
2	Percent body fat Percent	Percentage	PCTBF
	from Siri’s (1956) equation
3	Age in years	Years	Age
4	Weight in pounds	Pounds	Weight
5	Height in inches	Inches	Height
6	Neck circumference	Centimeters	Neck
7	Chest circumference	Centimeters	Chest
8	Abdomen circumference	Centimeters	Abdomen
9	Hip circumference	Centimeters	Hip
10	Thigh circumference	Centimeters	Thigh
11	Knee circumference	Centimeters	Knee
12	Ankle circumference	Centimeters	Ankle
13	Biceps extended circumference	Centimeters	Biceps
14	Forearm circumference	Centimeters	Forearm
15	Wrist circumference	Centimeters	Wrist
16	Body Mass Index	BMI	BMI
17	Overweight indicator	0 = Not Overweight	Overweight
		1 = Yes
18	Obese indicator	0 = Not Obese	Obese
		1 = Yes

      1.4.3 Coronary Heart Disease Data Set

The Coronary Heart Disease data set consists of 100 observations on patients who were selected in a study on the relationship between the age and the presence of coronary heart disease. The variables included in this data set are summarized in Table 1.3.

Table 1.3 A Description of the Variables in the Coronary Heart Disease Data Set

Variable	Description	Codes/Values	Name
1	Identification code	ID number	ID
2	Age in years	Years	Age
3	Coronary heart disease	0 = Absent	CHD
		1 = Present

      1.4.4 Prostate Cancer Study Data Set

The Prostate Cancer Study data set consists of 380 patients in a study to determine whether the variables measured at a baseline medical examination can be used to predict whether the prostatic tumor has penetrated a prostatic capsule. The data were collected by Dr. Donn Young at the Ohio State University Comprehensive Cancer Center and the data have been modified to protect subject confidentiality. Variables included in this data set are summarized in Table 1.4.

Table 1.4 A Description of the Variables in the Prostate Cancer Study Data Set

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Variable	Description	Codes/values	Name
1	Identification code	ID number	ID
2	Tumor penetration of	0 = No penetration	CAPSULE
	prostatic capsule	1 = Penetration
3	Age	Years	AGE
4	Race	1 = White	RACE