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  #1  
Old 05-31-2011
heights's Avatar
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Stats Freshman high school girls sex ed question

Freshman girls who attend sex education lectures will have a lower rate of teenage pregnancy by their sixteenth birthdays than girls who do not attend these lectures.

Select the appropriate type of study
a) Cross-sectional study
b) Case-control Study
c) Non-concurrent cohort study
d) Concurrent cohort study
e) Randomized clinical treatment trial
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  #2  
Old 05-31-2011
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Quote:
Originally Posted by heights View Post
Freshman girls who attend sex education lectures will have a lower rate of teenage pregnancy by their sixteenth birthdays than girls who do not attend these lectures.

Select the appropriate type of study
a) Cross-sectional study
b) Case-control Study
c) Non-concurrent cohort study
d) Concurrent cohort study
e) Randomized clinical treatment trial
Since you are comparing exposure to education vs. non exposure to education, I think it best fits Case-Control study?
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  #3  
Old 06-01-2011
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i think its concurrent cohort study

Last edited by salz; 06-01-2011 at 02:15 AM.
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Old 06-01-2011
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case control study ??
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  #5  
Old 06-01-2011
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Default E.

Since we have an "intervention" so its an experimental study.
All of the mentioned choices fall into the "observational spectrum" except E!
so i'll go with E.
and i guess we cannot say if its cohort or case-control. because we don't know if the researchers started with girls attending or not attending those lectures then following them along the line monitoring their sexual activity or the reverse! so i'll stick to E. as well

Last edited by carisma_200x; 06-01-2011 at 03:56 AM.
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Old 06-01-2011
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is it E .... but i am also confused with C
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Old 06-01-2011
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If we did randomize: intervention vs placebo, this is E
If we are just observing a phenomena:
exposed group vs unexposed group (sex education lectures)...follow up -> outcome (teenage pregnancy), this is a cohort study

the phrasing is a bit ambiguous
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Old 06-01-2011
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I would go with non-concurrent cohort study .C
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Old 06-01-2011
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Default Cohort study

I guess it is cohort study, not sure what type, so I go with C,
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Old 06-01-2011
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i think b)
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  #11  
Old 06-01-2011
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Default Ans: D Concurrent cohort study

Nice reasoning everyone! The correct answer is D. Concurrent cohort study. In this prospective study, a specific population (freshmen high school girls) that is free of the condition (pregnancy) at the start of the study is identified. Following assessment of exposure to the risk factor (not receiving sex education lectures), exposed and non-exposed subjects are compared to see who develops the condition (pregnancy).
b) Case-control study- these studies identify subjects who have the disorder and subjects who do not have the disorder, then information regarding prior exposure to the risk factor is obtained and compared using odds ratio.
d) In a randomized clinical trial, the effect of one treatment is compared versus another for a specified condition.

Sorry if this question was confusing! I was confused doing it too so I thought I'd post it and get some feedback from you guys The above explanation is the explanation that was given.
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