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#1
09-22-2015
 USMLE Forums Scout Steps History: Not yet Posts: 16 Threads: 1 Thanked 1 Time in 1 Post Reputation: 11
important biostatistic concept question

here is a question i don't have an answer to, plz help:

10 patients was followed for 5 years for the development of a disease. 3 out of the 10 quitted the study during variable times in study period. 4 out of the remaining 7 developed the disease during variable times in the study period. what is the incidence of the disease?
ps: im not sure if it is incidence during 5 years or during a year. maybe it is the latter. any thoughts????

#2
09-22-2015
 USMLE Forums Scout Steps History: Step 1 Only Posts: 19 Threads: 3 Thanked 6 Times in 1 Post Reputation: 16

I think you are looking for the incidence rate in person time years. You should be given the time each participant was followed for to calculate that.
Number of new cases/total amount in years.

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