1. In 2006, at the Health and Retirement Study identified a sample of 10,868 wom

Question

1. In 2006, at the Health and Retirement Study identified a sample of 10,868 women, and examined them for diabetes. 2,006 of the women had diabetes. The project then followed the subjects who did not have diabetes for two years. 1,087 either died from other causes, or were lost to follow up (assume they died or were lost to follow-up exactly half-way through the two-year follow-up period). 273 women developed diabetes during the study period.

a. How many women were at risk for developing diabetes at the beginning of the study? (Provide explanation)

b. What was the cumulative incidence of diabetes during the two-year study period (per 1000)? (Provide explanation/calculation)

c. How many women were followed for both years of the study? (provide explanation)

d. Considering the number of women that lasted only 1 year, and the number of women that lasted both years, calculate the total number of person-years for the study. (Provide calculation)

Explanation / Answer

1. The point of prevalence of diabetes in 2006 was 184.58.

2. 1635 women were at risk of developing diabetes during the study period.

3. The cumulative incidence of diabetes during the two year study period is 30.81.

4. 7775 number of women were followed for both years of the study.

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