View the step-by-step solution to:


In a closed cohort study that included 2,000 males age 40-59 years, 400 had initial serum cholesterol levels of

less than 220 mg %, 900 had levels of 220-270 mg % and 700 had levels greater than 270 mg %. Among these three cholesterol classes: (1) less than 220; (2) 220-270; and (3) greater than 270, the number of new cases of coronary heart disease during the first year of follow-up were 3, 12, and 14 respectively.


A. What was the incidence of coronary heart disease within each of the three cholesterol classes? (assume complete follow-up).

Top Answer

Incidence rates are 7.5,... View the full answer

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question