Question

question 32
6 points
in a population of 40 people at baseline, an acute illness (e.g., covid) over 12 months was studied. at the beginning of the study on day one, 11 people already had the illness. over the course of the study, 7 people developed the illness. calculate the incidence rate (please think carefully about who goes into the denominator of an incidence rate). calculate your rate per 100 people!
calculate the point prevalence on the first day of the study.
the incidence rate was blank 1 per 100 people and the prevalence was blank 2%. round both of your answers to one decimal point.
blank 1
add your answer
blank 2
add your answer

Explanation:

Step1: Calculate incidence rate

The denominator for incidence rate is the number of people at - risk (those who did not have the illness at the start). At the start, 11 people had the illness, so the number of people at - risk is $40 - 11=29$. The number of new cases is 7. The incidence rate per 100 people is calculated as $\frac{7}{29}\times100$.
$$\frac{7}{29}\times100=\frac{700}{29}\approx24.1$$

Step2: Calculate point prevalence

Point prevalence on the first day is the number of people with the illness on the first day divided by the total population, then multiplied by 100. The number of people with the illness on the first day is 11, and the total population is 40. So the point - prevalence is $\frac{11}{40}\times100$.
$$\frac{11}{40}\times100 = 27.5$$

Answer:

Blank 1: 24.1
Blank 2: 27.5