math(epidemiology)

A population of 100 healthy men was followed for the development of prostate cancer.

After being followed for 5 years, 20 men developed prostate cancer. Ten other men were followed for 1 year and then were lost to follow-up. The remaining men who never developed the disease were followed for 10 years. Calculate the number of person-years of observation accrued by this population.

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  3. 👁 970
  1. 5*20 + 1*10 + 10*70

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  2. Thank you for your help Steve, I used that equation and got 810py but I assumed my answer was wrong because I got such a big number.

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  3. when you're talking about 100 people, expect big numbers if covering a long time.

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  4. 845

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    2. 👎 1
  5. 0.85
    856
    785
    456

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    2. 👎 1

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