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2,000 men were enrolled in a study. They were followed by investigators for 4 years. Each...

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Statistics

2,000 men were enrolled in a study. They were followed byinvestigators for 4 years. Each year, the men were tested forprostate cancer. After yr 1 , there were no cases, but 20 men werelost to follow up. After 2nd year, there were 10 cases of cancerand 25 men were lost to follow up. At the end of the 3rd year,there were 16 cases and 3 men were lost. At the end of the 4thyear, there were 25 cases &30 men lost to follow up. What isperson-time incidence rate of cancer in this group?

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Solution Persontime incidence rate is calculated using the below formula Persontime incidence rateNumber of new cases during the period Time each person was observedtotaled for all person The persons lost to followup are on average diseasefree for    See Answer
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