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Old 06-02-2011
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Stats Biostatistics #6 - Type of study

An investigator is interested in the etiology of neonatal jaundice. To study this condition, he selected 100 children who were diagnosed with this condition and 100 children born in the same time period and in the same hospital who did not have a diagnosis of neonatal jaundice. He then reviewed the obstetrical and delivery records of their mothers to determine various prenatal and perinatal exposures. This is an example of a:


a. cross-sectional study
b. case-control study
c. retrospective cohort study
d. clinical trial
e. prospective cohort study
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  #2  
Old 06-02-2011
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My answer is B)
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  #3  
Old 06-02-2011
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Case control!
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Old 06-02-2011
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yup case control study.
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Old 06-02-2011
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I'll go with C.

He's looking for risk factors and he's doing it by examining the mother's pre-natal and peri-natal records, so he's looking back in time which makes it retrospective, and since it's risk factors he's looking for that makes it cohort. I think.
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case control
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  #7  
Old 06-02-2011
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Guess its B. case-control. cuz he started with the disease then went back in time to pick up the possible risk factors.

its not cross-sectional because there is time factor here.

not clinical trial because there's no intervention.

and in cohort study the researcher starts with the risk factor and goes forward in time detecting outcomes (i.e disease) the difference between prospective and retrospective cohort is that prospective means you define the groups at the beginning (those who have the risk factor vs. those who have not).
while in retrospective cohort you group your study participants based on their outcome (after the end of your study) although you started with risk factors and moved forward in time.
hope that helps
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Old 06-03-2011
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Yes, this is a case-control design
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Old 06-03-2011
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case control..easy one
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  #10  
Old 06-03-2011
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@earthpole...I know, this one was an "easy one"...

how about this one?
Biostatistics #8 - Type of study 2
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