relationship between periodontal disease and hypertension in a population of men and women.

1. A researcher is looking at the relationship between periodontal disease and hypertension in a population of men and women. He/she decides to collect relevant information on the following variables as potential confounders in the investigation: gender (M/F), education status (High School), annual income ($), health status (dissatisfied, somewhat dissatisfied, somewhat satisfied, satisfied), Body Mass Index (weight kg/height m2). Describe each of the relevant co-variables as ordinal, categorical, or quantitative

2. Suppose a researcher conducts an analysis of the relationship between cardiovascular disease and type II diabetes. The basic summary of the findings are presented in the following table.

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Patient

BMI (kg/m2)

Hypertension (Y/N)

Diabetes Type II (Y/N)

Smoking status (Never, Quit, Social, Current)

Education Status (High)

Alcohol (>2 drinks a day? Y/N)

Religious Background (Catholic, Jewish, Muslim, Other)

Ethnicity (AA, W, A, H, Other)

A

27

N

N

Current

High

Y

Other

A

C

21

N

N

Quit

High

Y

Other

W

D

28

Y

N

Social

>High

N

Muslim

W

E

36

Y

Y

Current

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