Question

In: Statistics and Probability

Refer to the article “Control of Cardiovascular Risk Factors in Patients With Diabetes and Hypertension at...

Refer to the article “Control of Cardiovascular Risk Factors in Patients With Diabetes and Hypertension at Urban Academic Medical Centers” (http://care.diabetesjournals.org/content/25/4/718.long)

a) Construct a 4x2 contingency table that illustrates the relationship between the following two variables: Hospital at which the patient was seen, and whether or not the patient had LDL £ 100 mg/dl. Use the Hospital names as the row headings and whether or not the patient had LDL £ 100 mg/dl as the column headings. Include the overall total as well as row and column totals. Use your table to answer the questions in parts b – e. (Note: Be careful when filling in your table - not all patients have data for these variables. When answering the questions below, use totals from your table.)

b) What percentage of all patients had LDL > 100 mg/dl?

c) What percentage of the patients at VAMC Brooklyn had LDL > 100 mg/dl?

d) What percentage of the patients at VAMC Detroit had LDL > 100 mg/dl?

e) What percentage of the patients having LDL £ 100 were seen at SUNY Brooklyn?

Solutions

Expert Solution

following 4x2 table has been generated (exluding total)

Hospital
Brooklyn VAMC SUNY Brooklyn Detroit VAMC WSU-UHC Detroit total
LDL
>100 195 341 100 7 643
<100 159 11 92 92 354
total 354 352 192 99 997

(b) What percentage of all patients had LDL > 100 mg/dl ?

required answer=100*643/997=64.5( one decimal approximation)

c) What percentage of the patients at VAMC Brooklyn had LDL > 100 mg/dl?

required anwer=100*195/354=55.1 ( one decimal approximation)

d) What percentage of the patients at VAMC Detroit had LDL > 100 mg/dl?

required anwer=100*100/192=52.1 ( one decimal approximation)

e) What percentage of the patients having LDL £ 100 were seen at SUNY Brooklyn?

required anwer=100*92/99=92.9 ( one decimal approximation)

( LDL is upto 100)


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