type of study design
Rates of prostate cancer were compared to those exposed to caloric restriction and those that were not exposed to such deprivation.
I have a list to select from:
Cohort
Cross sectional x
Case series
case control
experimental x
ecological x
Im sure its not ecological, cross sectional, experimental.
Im leaning toward Cohort: group pf people with a common chracateristic (prostate concer?) ...healthy people followed overtime to determine incidence of symptoms...exposed vs. non exposed
Could this be case series? Im not too sure about the definition of a case series design to be honest.
Im certain that it cant be case control either because we are not comparing exposure history to Case AND Controls..
HELP!
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Answers
The best design for this study would be a cohort design. In a cohort study, a group of people with a common characteristic (such as having prostate cancer) is followed over time to determine the incidence of a particular outcome, such as rates of prostate cancer. This type of design allows for the comparison of two exposed or unexposed cohorts to determine the risk or protective effect of a particular exposure (in this case caloric deprivation). A case series design does not compare exposed and unexposed subjects, so it cannot be used for this study. A case control design compares exposure history between those with a disease (cases) and those without (controls), but in this case, there is only one group being studied.
