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If the incidence rate of a very serious disease is 25/100,000 person-years and the prevalence of this disease in the population is 75/100,000, what is the average survival time of individuals who contract this disease? [Assume the population is in steady state]
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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 period prevalence from October 1, 2004, to September 30, 2005. The numerator of period prevalence includes anyone who was ill any time during the period. In Figure 3.1, the first 10 persons were all ill at some time during the period.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 incidence rate from October 1, 2004, to September 30, 2005, using the midpoint population (population alive on April 1, 2005) as the denominator. Express the rate per 100 population.The following figure represents 10 new cases of illness over about 15 months in a population of 30 persons. What is the incidence rate for the period between April 1 and Sept 30? Person # 1 2 3 7 8 9 10 ➡ ←P Oct. 1, 2004 18 per 100 25 per 100 3.6 per 100 01 per 100 Date of onset of illness +Date of death Date of recovery Apr. 1, 2005 Sept. 30, 2005
- In the absence of public health measures, hich of the following diseases will spread the most quickly through a population? OA disease with 1% lethality and an RO of 5.5 A disease with 2% lethality and an RO of 3.5 A disease with 2% lethality and an RO of 1.5 OA disease with 20% lethality and an RO of 1.1 A disease with 1% lethality and an RO of 1.5===================================Which of the following sentences is not true: a.Incidence rates describe the occurrence of new cases of a disease or condition in a community over a period of time relative to the size of the population at risk at the same time period. b.Mortality rates, or rates of illness, in public health are incidence and prevalence rates. c.A prevalence rate is the number of all cases of a specific disease or condition in a population at a given point in time relative to the population at the same point in time. Yazed sent Today at 3:04 AMOne factor causing another particular event are more complex than what exist in the epidemiological triangle as Causal relations. a.True. b.False. ======================= (Case finding, Screening, Health education); all of these are ways of Secondary prevention for COVID-19. a.True. b.False.Visit the website of the National Center for Health Statistics. Spend some time studying the leading causes of death for different age groups at www.cdc. gov/nchs/data/nvsr/nvsr56/nvsr56_05.pdf. What are the three leading causes of death for each age cohort listed? What are some of the policy implications?
- A population of 30 rabbits has been introduced into a new region. It is estimated that the maximum population the region can sustain is 400 rabbits. After 1 year, the population is estimated to be 90 rabbits. How many rabbits will there be after 3 years? In a city whose population is 100 000 an outbreak of flu occurs. When the city health department begins, its record keeping, there are 625 infected people. The number of infected people N is increasing at a rate proportional to the square root number of infected people at time t in weeks. One week later, there are 1600 infected people. Find the number of infected people two weeks after the record keeping begins.Number of cases 30,000 OOO 25,000 20,000 15,000 10,000 5,000 Reported TB Cases and Rates United States, 1993-2019 Number of cases --Incidence rate 0 1993 1995 1997 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 Year 2 90 Cases per 100,000 persons The graph above shows tuberculosis cases by year in the U.S. This graph is an example of a(n): Clustering Cyclic trend Epidemic curve Secular trendIn 2018, 8,533 new cases of Human Immunodeficiency Virus (HIV) infection were reported in the Philippines. The estimated mid-year population of the Philippines in 2018 was approximately 106,512,074. Calculate the incidence rate of HIV infection in 2018 per 100,000 population. * O 0.00000801 per 100,000 population O 0.0801 per 100,000 population O 8.01 per 100,000 population O 0.00801 per 100,000 population
- In an area of Washington, the occurrence of Multiple Sclerosis (MS) was investigated among the native white population (679,478 individuals) and among those of Japanese origin (16,122 individuals). At the time of the investigation it was found that for the two groups there were 395 and 10 cases of MS respectively. Which measure of disease occurrence can be calculated? Calculate it for each group.Identify what type of mortality indicator is depicted in the following graph.Calculate the R0 for a susceptible population of 8,500 people for a disease with a transmission rate of 0.00004 and an infectious period of 6 days. Note that 1,000 of the people in this population have been vaccinated for this disease. R0= SβL Group of answer choices 2.04 1.80 2.28 1.42 0.64