A loss of study participants to follow-up that are different than those not lost to follow-up...
A loss of study participants to follow-up that are different than those not lost to follow-up is an example of information bias.
Group of answer choices
True
False
Cohort studies are attractive when the period between exposure and disease are short.
Group of answer choices
True
False
Because cohort studies are conducted over long periods of time and can directly measure incidence, cohort studies do not require large study populations.
Group of answer choices
True
False
Homework Answers
A loss of study participants to follow-up that are different than those not lost to follow-up is an example of selection bias.
The statement is false.
Cohort study are not attractive when period between exposure and disease is short . cohort studies take time between exposure and development of disease.
The statement is false.
Cohort study uses large study population and is done for a long period of time.
The statement is false.
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A loss of study participants to follow-up that are different
than those not lost to follow-up...
Cohort studies, along with case-control and cross-sectional studies, are considered experimental studies. Group of answer choices...
Cohort studies, along with case-control and cross-sectional studies, are considered experimental studies. Group of answer choices True False A case-control study observes the differences between diseased and non-diseased, whereas a cohort study observes the differences between exposed and non-exposed. Group of answer choices True False In a cohort study, the exposure is not randomly allocated between study participants. Group of answer choices True False
27. Interpret your findings that you calculated in # 26. study design. c. experimental 28. The...
27. Interpret your findings that you calculated in # 26. study design. c. experimental 28. The well-known Framingham Study employs the a case-control b. cohort 20. When selecting control subjects for a case-control study, the control group members should (select the best answer): resemble the case subjects b. have already had the disease of interest have had no opportunity to be exposed to the disease. be very ill hospital patients 30. True False W hen using the cohort study design...
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...
Which statements are true, and which are false? Explain. Tor F Recall bias always results in...
Which statements are true, and which are false? Explain. Tor F Recall bias always results in an underestimate of the magnitude of association. Tor F Prospective cohort studies are prone to recall bias. Tor F Interviewer bias can produce either an over-estimate or under-estimate of the magnitude of association. Tor F Significant loss to follow up can cause an over-estimate or under-estimate of the magnitude of association in a prospective cohort study. Tor F Case-control studies are vulnerable to bias...
9. Bias is less likely to invalidate a cohort study used to assess the risk of...
9. Bias is less likely to invalidate a cohort study used to assess the risk of disease due to an exposure because: A. The presence or absence of exposure is determined prior to disease occurrence B. The sample sizes in cohort studies are large C. Disease status is always known at the start of the study D. Incident cases of the disease are distinguished from prevalent cases in the analyses E. Analyses are based on a comparison of the proportion...
Choose the study design that best matches each statement described below. The study design may be...
Choose the study design that best matches each statement described below. The study design may be used more than once or none at all. (24 points) Statement Study Design ____ Blinding or masking is used to control potential bias. Case-Control ____ Observational epidemiological studies, this design is cheaper and faster to conduct because of the usage of already existing data. Cross-sectional ____ Control groups can receive the current “standard” treatment or a placebo. Ecological ____ Data on exposure and outcome...
39. studies are usually executed when the knowledge level is relatively high in regards to the...
39. studies are usually executed when the knowledge level is relatively high in regards to the relationship of the exposure and disease being studied. a. Case-control b. Cohort 40. In using the study design, the epidemiologist divides study participants on whether or not they have a certain exposure and then waits to see if a certain disease/injury eventually occurs. a. case-control b. cohort 41. In a randomized clinical trial "this" has got to be a part of the study protocol....
Measurement bias occurs when the people who take part in a study are systematically different from...
Measurement bias occurs when the people who take part in a study are systematically different from those who do not. Group of answer choices True False Specificity is the is the proportion of disease-free people who are so identified by the screening test. Group of answer choices True False Which of the following are commonly expressed per 1000 at risk? Group of answer choices Crude birth rate Infant mortality rate Neonatal mortality rate Fetal death rate All of the above...
3) True or False? If the goal of the study is to understand populations, describe patterns, or ask research questions that are not focused on causality, the best design may be a cross-sectional or co...
3) True or False? If the goal of the study is to understand populations, describe patterns, or ask research questions that are not focused on causality, the best design may be a cross-sectional or cohort study. True False 5) True or False? Case definitions are essential for any outbreak investigation no matter which study approach is used to investigate the epidemic. 6) True or False? Cross-sectional surveys are used to establish baseline data prior to the initiation of longitudinal studies....
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...
27. Interpret your findings that you calculated in # 26. study design. c. experimental 28. The well-known Framingham Study employs the a case-control b. cohort 20. When selecting control subjects for a case-control study, the control group members should (select the best answer): resemble the case subjects b. have already had the disease of interest have had no opportunity to be exposed to the disease. be very ill hospital patients 30. True False W hen using the cohort study design...
Which statements are true, and which are false? Explain. Tor F Recall bias always results in an underestimate of the magnitude of association. Tor F Prospective cohort studies are prone to recall bias. Tor F Interviewer bias can produce either an over-estimate or under-estimate of the magnitude of association. Tor F Significant loss to follow up can cause an over-estimate or under-estimate of the magnitude of association in a prospective cohort study. Tor F Case-control studies are vulnerable to bias...
9. Bias is less likely to invalidate a cohort study used to assess the risk of disease due to an exposure because: A. The presence or absence of exposure is determined prior to disease occurrence B. The sample sizes in cohort studies are large C. Disease status is always known at the start of the study D. Incident cases of the disease are distinguished from prevalent cases in the analyses E. Analyses are based on a comparison of the proportion...
39. studies are usually executed when the knowledge level is relatively high in regards to the relationship of the exposure and disease being studied. a. Case-control b. Cohort 40. In using the study design, the epidemiologist divides study participants on whether or not they have a certain exposure and then waits to see if a certain disease/injury eventually occurs. a. case-control b. cohort 41. In a randomized clinical trial "this" has got to be a part of the study protocol....
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...
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