n the early 1990s, 7,000 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 2000. The total was 56,232 person-years. During follow-up, 1,890 of the participants died, and of these, 950 were due to coronary heart disease. What is the coronary heart disease specific mortality rate/density of participants in this cohort

The coronary heart disease specific mortality rate/density of participants in this cohort

= 13.57%

Step-by-step explanation:

a) Data and Calculations:

Total participants in the cohort = 7,000 persons

Total person-years contributed = 56,232

Death during follow-up = 1,890

Number of death due to coronary heart disease = 950

Mortality rate/density of participants in this cohort

= 950/7,000 * 100 = 13.57%

b) The result suggests that 13.57% of the 7,000 participants died during follow-up out of coronary heart disease.  This number represents about 50% (950/1,890 * 100) of all deaths recorded during follow-up.

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation:

answer: options

step-by-step explanation: