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In the early 2000s, 8,000 elderly Dutch

In the early 2000s, 8,000 elderly Dutch men and women were included in a prospective cohort study (follow-up is involved). A number of participants were lost to follow-up during the course of the study and no information was available on those after they were lost to follow-up. The investigators computed how many person-years each participant had contributed to the study until January 2010. The total was 80,000 person-years. During follow-up, 2,400 of the participants died, and of these, 800 were due to coronary heart disease. What is the coronary heart disease specific mortality rate/density of participants in this cohort? A. 100 per 1,000 B. 1 per 1,000 C. 33.3% D. 1.07 per 1,000 person-years E. 10 per 1,000 person-years

 
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