In 1985, a researcher conducted a study of mortality among a cohort of shipyard workers who were employed at Pearl Harbor naval yard during World War II. This example illustrates which type of study design?
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Please Help with this question:
In 1985, a researcher conducted a study of mortality among a cohort of shipyard workers who were employed at Pearl Harbor naval yard during World War II. This example illustrates which type of study design?
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case-control study
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prospective cohort study
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proportional mortality study
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retrospective cohort study
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- A study was conducted by the NIH (National Institute for Health) with a large population that examined smoking and the occurrence of lung cancer. In the duration of the study period, 1,800 smokers developed lung cancer. In the same period, 200 nonsmokers developed lung cancer. There were 241,800 current smokers and 478,000 nonsmokers in the total study population. 1.what type study ? Study design options: Ecological, Cross-sectional, Case Control, Prospective Cohort, RetrospectiveCohort, Randomized Clinical TrialCircle type of the study design below indicated. An investigator takes a sample of healthy individuals, record their ongoing solar exposure, and relate that to the subsequent occurrence of skin cancer in the same group. Case-control study Ecological study Cohort study Cross-sectional studyThe best study design for investigating multiple exposures linked with an outcome, which has a very low prevalence is ___________________ a. Cross-sectional study b. Randomized control study c. Prospective cohort study d. Case-control study
- In which scenario would it be best to select a case-control study design over a retrospective cohort study design? (select one best answer) Group of answer choices a. The outcome being studied is rare b. The exposure of interest is rare c. There are multiple outcomes of interest d. When were are interested in directly calculating incidence rates e. None of the aboveIn a cohort study, the ratio of the incidence rate of a disease in an exposed group to the incidence rate of the disease in a nonexposed group is the: a. Relative risk b. Risk difference c. Prevalence ratio d. Odds ratioThe Framingham Study is an ongoing, longitudinal study of heart disease and other chronic conditions that began over 60 years ago with approximately 5,000 residents of a small city in Massachusetts. What type of study design is used for this famed investigation? retrospective cohort prospective cohort case control clinical
- What is the difference between a cohort study and a case control study, and what are the strengths and weaknesses inherent in their design, respectively?Which of the following is not true of cohort studies? a. Risk can be observed directly in a cohort study b. Cohort studies are good for studying the impact of rare exposures in the population c. The exposure is well defined in cohort studies d. Cohort studies carry the highest risk of misclassification of exposures (that is, incorrect identification of participants as exposed or unexposed)Case-control study, prospective cohort study, cross-over trial, and retrospective cohort study are all examples of observational study designs. Is it true?
- You are an epidemiologist who hypothesizes that the rare exposure of living close to power lines by expectant mothers during pregnancy is a potential cause of premature birth, a relatively common pregnancy outcome. (Exposure = “close to power lines”; Outcome = “premature birth”). A _____ design would be best suited for this scenario, because _____. a)A cohort study; it is suited to rare exposures, short periods of follow-up and common outcomes b)A case-control study; it is suited to rare exposures, short periods of follow-up and common outcomes c)A cohort study; it will allow the epidemiologist to study multiple exposures in addition to a raw-food vegan diet d)A case-control study; it is suited to studying a variety of outcomes in addition to premature birth e) None of the AboveTo test the efficacy of vitamin C in preventing colds, army recruits were randomly assigned to one of two groups: 500 mg of vitamin C daily and a placebo (sugar pill) daily. Both groups were then followed for a year to determine the number and severity of subsequent colds. What type of study design is it? Ecologic study Quasi experimental study Case-control study Cohort study Randomized controlled trialIt is often stated that excess mortality (in general) is higher in low socioeconomic populations. Which factors contribute to this statistic?