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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