A researcher wants to assess the association between the prevalence of high bloo

Question

A researcher wants to assess the association between the prevalence of high blood pressure and amounts of processed foods. The education level is found to be a confounder. Compute the crude OR for high BP comparing diet high in processed foods group vs. diet low in processed foods group (reference group). (round to 2 decimal places) HINT: you need to rearrange the table. Diet Low in Processed Foods Normal BP High BP Total College Education 124 55 179 High School Education 69 152 221 Total 193 207 400 Diet High in Processed Foods Normal BP High BP Total College Education 64 85 149 High School Education 98 153 251 Total 162 238 400 42. (1.5 points) Based on the data provided in Q41, compute the education level adjusted OR for high BP comparing diet high in processed foods group vs. diet low in processed foods group (reference group).

Explanation / Answer

Part (a)

High BP – Low Diet vs High Diet

Under the ‘Diet Low on Processed Food’ category, OR for High BP = 207/400 = 0.51.

Under the ‘Diet High on Processed Food’ category, OR for High BP = 238/400 = 0.58.

Numerically, the latter OR is higher which is possibly an indication that High has a tendency to increase BP. ANSWER

Part (b)

High BP vs Education

Under the ‘Diet Low on Processed Food’ category,

OR for High BP = 65/179 = 0.36 for ‘College Education’

And 152/221 = 0.69 for ‘High School Education’. Possibly implying that higher education has favourable impact on BP. ANSWER 1

Under the ‘Diet High on Processed Food’ category,

OR for High BP = 85/149 = 0.57 for ‘College Education’

And 153/251 = 0.61 for ‘High School Education’. Possibly implying that higher education has favourable impact on BP albeit only marginally. ANSWER 2

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.