You are called to investigate a possible health problem in an office building th

Question

You are called to investigate a possible health problem in an office building that may be due to an 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 complain 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 cumulative incidence of respiratory distress over a 30 day period?

a. 35%

b. 65%

c. 11.6 per 100 person-days

d. 35 per 100 person-days

Explanation / Answer

Cumulative incidence of respiratory distress ovr 30 day period = (35 + 70)/300 = 0.35

So, it is 35 per 100 person - days

So,

Correct option:

d.   35 per 100 person - days

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