The double jeopardy of clustered measurement and cluster randomisation
Open Access
- 21 August 2009
- Vol. 339 (aug21 1) , b2900
- https://doi.org/10.1136/bmj.b2900
Abstract
Michael S Kramer and colleagues suggest that double clustering might explain the negative results of some cluster randomised trials and describe some strategies for avoiding the problemKeywords
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