A hypothetical population of 3000 elderly adults was recruited for a 10-year study of Alzheimer's disease. Upon initial exam prior to the start of follow-up, 450 cases of the disease were diagnosed and excluded from further study. Over the 10-year study period, 640 new cases of Alzheimer's disease developed, and 215 of those incident cases died from the disease. The study participants contributed a total of 18,500 person-years of follow-up time. Calculate the Alzheimer's disease incidence rate per 1000 population during this study. Round to the nearest whole number. Include only the numerical answer (no units) in the answer box.
A hypothetical population of 3000 elderly adults was recruited for a 10-year study of Alzheimer's disease. Upon initial exam prior to the start of follow-up, 450 cases of the disease were diagnosed and excluded from further study. Over the 10-year study period, 640 new cases of Alzheimer's disease developed, and 215 of those incident cases died from the disease. The study participants contributed a total of 18,500 person-years of follow-up time. Calculate the Alzheimer's disease incidence rate per 1000 population during this study. Round to the nearest whole number. Include only the numerical answer (no units) in the answer box.
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Transcribed Image Text:A hypothetical population of 3000 elderly adults was recruited for a 10-year study of Alzheimer's disease. Upon initial exam prior to the start of follow-up, 450 cases of
the disease were diagnosed and excluded from further study. Over the 10-year study period, 640 new cases of Alzheimer's disease developed, and 215 of those
incident cases died from the disease. The study participants contributed a total of 18,500 person-years of follow-up time.
Calculate the Alzheimer's disease incidence rate per 1000 population during this study. Round to the nearest whole number. Include only the numerical
answer (no units) in the answer box.
Expert Solution
Step 1
Incidence rate = no of new diagnosed cases divided by total population at risk during that period x1000
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