What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator...
What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator and which group is the denominator). Remember a RR or OR(odds ratio) compares the risk of disease in those exposed to the risk of disease in those unexposed.
Homework Answers
The relative risk is a good statistic to calculate the probability of getting a particular disease in a group with a particular exposure as compared to those without the exposure.
Relative risk = incidence risk among an exposed group / incidence risk among non - exposed group
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What does a relative risk (RR) represent (The fraction in the
slides-which group is the numerator...
What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator...
What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator and which group is the denominator). Remember a RR or OR(odds ratio) compares the risk of disease in those exposed to the risk of disease in those unexposed. What does it generally mean when you have a RR=1, RR<1or a RR>1
Person-Years at Risk and Incidence Density Person-Years at Risk sum of the amount of time a...
Person-Years at Risk and Incidence Density Person-Years at Risk sum of the amount of time a participant is at risk for the outcome in a study. (# persons x at risk for 1 year + # persons x at risk for 2 years + # persons x at risk for 3 years, etc.) Incidence Density (IDL- new cases of disease or mortality in persons at risk/person-time at risk. Incidence Density in Not Exposed (IDE) Person-time at risk Incidence Density in...
16. Based on the Relative Risk Aversion (RR) and CRRA utility function (with y 1) and...
16. Based on the Relative Risk Aversion (RR) and CRRA utility function (with y 1) and the odds result: 1 0 70(,0) = 5 +7 a. What is the coefficient of risk aversion (Y) that makes roy, 0)=1, when y=100 and 0 =0.50? b. What is the coefficient of risk aversion (Y) that makes moy, 0)=1, when y=100 and 6 -0.25? c. Which individual is more risk averse based on the coefficient of risk aversion? d. What is the coefficient...
Question 1. Other than indicating positive association, what does a relative risk of 2.3 means in terms of expose a...
Question 1. Other than indicating positive association, what does a relative risk of 2.3 means in terms of expose and non-exposed group? Provide one more meaning. Question 2. Explain the difference between the risk difference and relative risk.
9. When you desire to study the effects of a rare exposure on a disease using...
9. When you desire to study the effects of a rare exposure on a disease using observational methods, you would optimally employ the type of study design. Remember you would likely need to conduct your study in a place where the exposure occurs. cohort b ase-control 10. Another name for a retrospective study is an) study b. cohort e experimental 11. You have completed a year long study of the effectiveness of a reading program among second graders. At the...
Multiple Question: 12. The relative risk for dying from lung cancer among smokers is 10. The...
Multiple Question: 12. The relative risk for dying from lung cancer among smokers is 10. The relative risk for dying from heart disease among smokers is 1.5. The etiologic fraction for lung cancer due to smoking is 0.8 and the etiologic fraction for heart disease due to smoking is 0.2. Based on these finding, we can say that Smoking seems much more likely to be causally related to heart disease than to lung cancer. Smoking seems much more likely to...
Incidence and prevalence rates can also be used to compare the rates of disease across different...
Incidence and prevalence rates can also be used to compare the rates of disease across different settings (places), people, or time. We therefore need measures of comparison. The ratio of two measures of disease frequency is called the relative risk. The difference between two measures of disease frequency is called the risk difference, or rate difference. In some cases, it involves a measure in an exposed group (or groups) and a measure in an unexposed or comparison group. In other...
1. (True or False) The relative risk (RR) is useful in planning health program while the...
1. (True or False) The relative risk (RR) is useful in planning health program while the attributable risk (AR) is useful in etiologic study of the disease. 2, (True or False) To avoid the selection bias in a case-control study, cases and controls should be selected independently of exposure status. 3. In a case-control study, which of the following is NOT an advantage of using hospital controls? a)They are easily identified. b)Their recall is likely better c)They tend to be...
a. What is the relative risk of CHD associated with baldness? In one sentence, interpret this...
a. What is the relative risk of CHD associated with baldness? In
one sentence, interpret this relative risk.
b. Does this result suggest that baldness may be a cause of CHD?
Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and followed all of them for 10 years...
(a) What is the relative risk of CHD associated with baldness? In one sentence, interpret this...
(a) What is the relative risk of CHD associated with baldness?
In one sentence, interpret this relative risk. --> 4.08
What is b in this situation?
(b) Does this result suggest that baldness may be a
cause of CHD? Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and...
Person-Years at Risk and Incidence Density Person-Years at Risk sum of the amount of time a participant is at risk for the outcome in a study. (# persons x at risk for 1 year + # persons x at risk for 2 years + # persons x at risk for 3 years, etc.) Incidence Density (IDL- new cases of disease or mortality in persons at risk/person-time at risk. Incidence Density in Not Exposed (IDE) Person-time at risk Incidence Density in...
16. Based on the Relative Risk Aversion (RR) and CRRA utility function (with y 1) and the odds result: 1 0 70(,0) = 5 +7 a. What is the coefficient of risk aversion (Y) that makes roy, 0)=1, when y=100 and 0 =0.50? b. What is the coefficient of risk aversion (Y) that makes moy, 0)=1, when y=100 and 6 -0.25? c. Which individual is more risk averse based on the coefficient of risk aversion? d. What is the coefficient...
Question 1. Other than indicating positive association, what does a relative risk of 2.3 means in terms of expose and non-exposed group? Provide one more meaning. Question 2. Explain the difference between the risk difference and relative risk.
9. When you desire to study the effects of a rare exposure on a disease using observational methods, you would optimally employ the type of study design. Remember you would likely need to conduct your study in a place where the exposure occurs. cohort b ase-control 10. Another name for a retrospective study is an) study b. cohort e experimental 11. You have completed a year long study of the effectiveness of a reading program among second graders. At the...
a. What is the relative risk of CHD associated with baldness? In
one sentence, interpret this relative risk.
b. Does this result suggest that baldness may be a cause of CHD?
Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and followed all of them for 10 years...
(a) What is the relative risk of CHD associated with baldness?
In one sentence, interpret this relative risk. --> 4.08
What is b in this situation?
(b) Does this result suggest that baldness may be a
cause of CHD? Why or why not?
To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohor study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and...
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