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Questions 1, 2 and 3 are based on the following epidemiological data A village has a total population of 1,000 and the hospital is reporting cases of Disease X The following data was collected YEAR Total With Disease XNew cases of XCured of X At beginning of year r the year By end of year 2013 100 2014 120 2015 130 2016 120 30 30 1) What was the prevalence of disease X at its peak? 2) What was the incidence of disease X in 2015? 3) What is the expected prevalence of disease X for the start of 2017?
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Answer #1

Prevalence of disease: means number of disease cases that are present in a particular population of a given area or its the old cases already present in that area at a given period of time.

Incidence of cases: means number of new disease cases that develope in a given period of time.

1) Prevalence of disease X at its peak: The prevalence of disease X at its peak was during the year 2015 with 130 cases.

2)The incidence of disease X in 2015 : were about 30 new disease cases.

3)The expected prevalence of disease X for the start of 2017 would be 90 cases.As in the year 2016 the old cases that is the prevalence cases were 120, and new cases were about 20 cases so total cases were 140.And 50 cases were cured.So the expected cases for 2017 are (140-50=90).So 90 prevalence cases for the year 2017.

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