Question

You are called to investigate a possible health problem in an office building that may be due to a potential environmental toxin. You arrange with a company that occupies two levels of the building to follow all 300 office employees for 30 days. Every day the employees report their health status. Nothing happens until day 10, when 35 employees report of respiratory distress. On day 20, 70 employees report of respiratory distress. The remaining employees do not report any problems over the 30 day period. What is the incidence rate of respiratory distress in this study population? a. 1.4 per 100 persondays b. 2.1 per 100 persondays c. 2.8 per 100 persondays d. 1.0 per 100 persondays

Answer 1

Respiratory distress is a respiratory condition in which people suffer from low organs oxygen supply due to fluid filled assure passes and alveoli sacs.

If we go for the incidence rate of respiratory distress in the above study population,

First 10 days there is no case is reported.

At 10th day 35 cases were reported.

At 20 th day 70 cases were reported

Later there is no new cases upto 30 days.

So overall in 30 days 105 cases were reported.

Totally 300 office employees are working.

105case /300 officers=35/100persons for 30 days.

for one day 35cases/30days =1.1case/day in 100 person

So answer is approximately 1 per100 persons/day is suffering from respiratory distress.

d. 1 per 100 person day