cluster randomised trial

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cluster randomised trial2016-10-22T14:48:37+00:00

cluster randomised trial 

EVIDENCE-BASED MEDICINE

A type of clinical trial in which blocks of patients–as opposed to individual patients–are randomised.

Pros Ability to study interventions that can’t be directed to selected individuals; ability to control for contamination by others–e.g., one person’s changing behaviours may influence another person’s behaviour.

Cons Greater complexity in design and analysis; requires many more subjects to achieve the same statistical power as conventional trials.

Synonyms Cluster randomised controlled trial, group-randomised trial, place-randomised trial

Reference http://en.wikipedia.org/wiki/Cluster_randomised_controlled_trial  

 

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