Calculate the point prevalence on April 1, 2005. Point prevalence is the number

Question

Calculate the point prevalence on April 1, 2005. Point prevalence is the number of persons ill on the date divided by the population on that date. On April 1, seven persons (persons 1, 4, 5, 7, 9, and 10) were ill.

Show the formula, calculations and the interpret the results

PROBLEM 1. (6 points) Figure 1, below represents 10 new cases of illness in a population of 20 persons over a period of 15 months. Each horizontal line represents the period of time one person spends beingi. The down arrow indicates the date of onset of illness. The solid line represents the duration of illness. The up arrow and the cross represent the date of recovery and date of death, respectively FIGURE 1. New Cases of lllness from October 1, 2004-September 30, 2005 Date of onset of illness Date of death Date of recovery Person # 1 2 3 4 5 7 8 10 Oct. 1, 2004 Apr. 1, 2005 Sept. 30, 2005

Explanation / Answer

The total population =20 people at the beginning.

Point prevalence is calculated by the formula =

Number of ill people divided by population at that date ie 1,4,5,7,9,10=6people divided by total population at that date ie April 2005.=18 because 2 have died. As such we get 6/18=1/3=0.33=33%.it means that population is not Healthy, and majors part of the population is unhealthy.

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