Calculating Incidence versus Prevalence The picture represents 10 new cases of illness over about 15 months in a population of 20 persons. Each horizontal line represents one person. 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. The picture New: Cases of Illness from October 1, 2004–September 30, 2005 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

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 66E
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Calculating Incidence versus Prevalence

The picture represents 10 new cases of illness over about 15 months in a population of 20 persons. Each horizontal line represents one person. 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.

The picture New: Cases of Illness from October 1, 2004–September 30, 2005

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.

4 Date of onset of illness
+ Date of death
4 Date of recovery
Person #
1
2
3
4
5
6
7
8
10
Oct. 1, 2004
Apr. 1, 2005
Sept. 30, 2005
Transcribed Image Text:4 Date of onset of illness + Date of death 4 Date of recovery Person # 1 2 3 4 5 6 7 8 10 Oct. 1, 2004 Apr. 1, 2005 Sept. 30, 2005
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