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U wIll occur! 13, Porphyrs s a rare disease with a prevalence of about one in...
Scenario 1: The prevalence (a + c in the table below) of previously undetected diabetes in...
Scenario 1: The prevalence (a + c in the table below) of previously undetected diabetes in a population to be screened is approximately 1.5% and it is assumed that 10,000 persons will be screened. The screening test will measure blood serum sugar content. A value of 180 mg/dl or higher is considered positive. The sensitivity (a) and the specificity (d) associated with this screening are 22.9% and 99.8% respectively. Questions 1-9: set up a two by two table with the...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like you. A test for the disease has sensitivity of 92% and specificity of 87%. Using the technique described in this chapter, compute the probability (as a %) that you actually have the disease, given that your test results are positive. (Round your answer to two decimal places.) % 21
True or False 1.A key difference between analytic and descriptive studies this that analytic studies are...
True or False 1.A key difference between analytic and descriptive studies this that analytic studies are causally oriented. True or False 2.If the relative risk of developing diabetes among residents of Springfield and Boston is 1 it means that the risk of developing diabetes is the same in both cities. True or False 3.Cohort studies are often used to study rare health outcomes. True or False 4.Sensitivity and specificity of a screening test is the same in all populations. True...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug...
Medical screening tests are used to check for the presence on disease, evidence of illegal drug use, etc. The its sensitivity and its specificity. The sensitivity among those with the condition that will test positive. The specichy proportion among those without the condition that will test neg sensitivity of a test is defined to be the conditional ng those without the condition that will test negative. More formally, the test is defined to be the conditional probability that a person...
Measuring Morbidity, Prevalence, and Incidence
In Community X (population 20,000), an epidemiologist conducted a prevalence survey in January of 2012 and reported an HIV prevalence of 2.2%. Over the next 12 months, the department of health reported an additional 50 new HIV cases between February 2012 and January 2013. The total population stayed constant at 20,000.Part 11. How many people had HIV in January 2012? Present or describe the formula you used to arrive at your answer.2. Calculate the incidence rate assuming no HIV-related deaths...
1. Someone new is preparing media for lab and adds buffers to the EMB agar that...
1. Someone new is preparing media for lab and adds buffers to the EMB agar that raise the pH to 7.8. The starting pH of EMB plates should be 6.9 – 7.3. No one is aware of the change. The EMB plates are inoculated for identification of unknown bacteria. After the appropriate incubation time, the results are interpreted. A. Discuss the consequences of the change in starting pH to the interpretation of the results. (The answer is not that no...
You work at a company that makes a drug (DeFuzz) to treat Fuzzy eye disease. (I...
You work at a company that makes a drug (DeFuzz) to treat Fuzzy eye disease. (I made this up- I don’t think there is such a condition) The prevalence of Fuzzy eye disease in the U.S. is 0.5%. Most infected don’t know they have Fuzzy eye disease until vision is impaired years later. Your company funds a non-profit organization to offer free screening for Fuzzy eye in Michigan. The group screens 800 Michiganders per week for 3 weeks. The screening...
You work at a company that makes a drug (DeFuzz) to treat Fuzzy eye disease. (I made this up- I don’t think there is suc...
You work at a company that makes a drug (DeFuzz) to treat Fuzzy eye disease. (I made this up- I don’t think there is such a condition) The prevalence of Fuzzy eye disease in the U.S. is 0.5%. Most infected don’t know they have Fuzzy eye disease until vision is impaired years later. Your company funds a non-profit organization to offer free screening for Fuzzy eye in Michigan. The group screens 800 Michiganders per week for 3 weeks. The screening...
It is understood that in number 4, the blood types do not add up to 1.0...
It is understood that in number 4, the blood types do
not add up to 1.0 and that is fine.
Problem #1 (8 points) Suppose you have gone bowling with an excellent player who bowls a strike (ie when they hit all of the pins) 73% of the time. By the fourth frame, this person realizes that they can clincha first place in a local tournament by bowling 3 consecutive strikes. What is the likelihood of this happening! Problem #2:...
ra Suppose a rare disease occurs in about 1 out of 1,000 people who are like you. A test for the disease has sensitivity of 92% and specificity of 87%. Using the technique described in this chapter, compute the probability (as a %) that you actually have the disease, given that your test results are positive. (Round your answer to two decimal places.) % 21
Medical screening tests are used to check for the presence on disease, evidence of illegal drug use, etc. The its sensitivity and its specificity. The sensitivity among those with the condition that will test positive. The specichy proportion among those without the condition that will test neg sensitivity of a test is defined to be the conditional ng those without the condition that will test negative. More formally, the test is defined to be the conditional probability that a person...
It is understood that in number 4, the blood types do
not add up to 1.0 and that is fine.
Problem #1 (8 points) Suppose you have gone bowling with an excellent player who bowls a strike (ie when they hit all of the pins) 73% of the time. By the fourth frame, this person realizes that they can clincha first place in a local tournament by bowling 3 consecutive strikes. What is the likelihood of this happening! Problem #2:...
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