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(EPIDEMIOLOGY QUESTION) Suppose that you are following a group of children for the development of asthma...

(EPIDEMIOLOGY QUESTION)

Suppose that you are following a group of children for the development of asthma over a one- year period. You identify 100 children on January 1st, screen them for asthma, and set up a monitoring program to check on their status on a monthly basis. Five children are considered prevalent cases because they were diagnosed with asthma before January 1st. Ten children develop asthma on March 1st and another ten children develop asthma on July 1st. Another 10 children who remain healthy were followed for a total of six months and then were lost to follow-up. All of the remaining children did not develop asthma and were not lost to follow-up. Follow-up ended on December 31st. How many person-months of observation were accrued by this population?

a. 730

b. 980

c. 1040

d. 920

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Answer #1

The answer to the above question is d) i.e 920

920 person - months of observation were accrued by this population.

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