study designs

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Dear Members,

FACTORIAL DESIGNS

The factorial design attempts to evaluate two interventions compared

with control in a single experiment. Given the cost & effort in recruiting

participants & conducting CTs, getting two experiments done at once is

appealing. It is a complex design type. A concern is the possibility of the

existence of interaction & its impact on the sample size. Interaction means that

the effect of interaction X differs depending on the presence or absence of

intervention Y, or vice versa. It is more likely to occur when 2 interventions

are expected to have related mechanisms of action.

Regards,

Dr. Vijaya Chaudhari.

JR-3,Dept. of Pharmacology,

Government Medical College, Nagpur.