A national survey is conducted to assess the association between hypertension an

Question

A national survey is conducted to assess the association between hypertension and stroke in persons over 75 years of age with a family history of stroke. Development of stroke is monitored over a 5 year follow-up period. The data are summarized below and the numbers are in millions. (15 pts) Developed Stroke Did not Develop Stroke Hypertension 12 37 No Hypertension 4 26 a. Compute the cumulative incidence of stroke in persons over 75 years of age (5 pt) Cumulative Incidence 5 Years _____ b. Compute the relative risk of stroke in hypertensive as compared to non-hypertensive persons (5 pt) Relative Risk = c. Compute the odds ratio of stroke in hypertensive as compared to non-hypertensive persons (5 pt) Odds Ratio =

Explanation / Answer

Solution:

a) Compute the cumulative incidence of stroke in persons over 75 years of age
Cumulative Incidence= 12 + 4 = 16
b) Compute the Relative Risk of stroke in hypertensive as compared to non- hypertensive persons
Relative Risk= (12/(12+37))/(4/(4+26)) = 1.8367
c) Compute the Odds Ratio of stroke in hypertensive as compared to non- hypertensive persons
Odds Ratio = (12 * 26)/(4 * 37) = 2.1081

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