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Two hundred 200 healthy men were followed for the development of prostate cancer. After being followed...

Two hundred 200 healthy men were followed for the development of prostate cancer. After being followed up for 6 years, 75 men of the study sample developed prostate cancer. Another 25 men were lost to follow-up after being followed up for 2 years each and we do not have information about their prostate cancer status. The remaining men who never developed the disease were followed up for 15 years. Calculate the incidence density of prostate cancer in this sample.

A. 37.5 per 1000 person-years

B. 49 per 1000 person-years

C. 28.5 per 1000

D. 375 per 1000

E. 37.5 per 1000

math   Statistics-And-Probability   
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