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Old 05-30-2013
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Stats What type of study?

An investigator is designing a study to compare a new behavioural program for ADHD with standard behavioural modification program for this disorder, because ADHD is more common among boys, girls and boys are randomized into the two treatment group separately. Which of the following types of treatment allocation is more likely being used in this study ?

A. Alternation
B. Open
C. Outcome-adapted
E. Stratification

Good if I get some explanation regarding remaining options.
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Old 06-01-2013
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Question

Can anybody ans this plz???
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  #3  
Old 06-02-2013
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According to High-Yield Biostatistics, this is a form randomization called Stratified Randomization. A direct quote from text, "The population under study is first divided, or stratified, into subgroups that are internally homogeneous with respect to the important factor (e.g., race, disease severity.) Equal numbers of patients from each subgroup are then randomly allocated to the experimental and control groups. The two groups are therefore similar, but their exact membership is still a result of randomization." So I would guess the answer is E. Hopefully, forum members with more understanding in biostatistic can confirm or refute,
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