Determinants of the intracluster correlation coefficient in cluster randomized trials: the case of implementation research.

@article{Campbell2005DeterminantsOT,
  title={Determinants of the intracluster correlation coefficient in cluster randomized trials: the case of implementation research.},
  author={Marion K. Campbell and Peter M. Fayers and Jeremy M. Grimshaw},
  journal={Clinical trials},
  year={2005},
  volume={2 2},
  pages={99-107}
}
The objective of this research was to identify determinants of the magnitude of intracluster correlation coefficients (ICCs) in cluster randomized trials from the field of implementation research. A survey of experts was conducted to generate a priori hypotheses of factors that might affect ICC size. Hypotheses were tested on empirical estimates of ICCs calculated from 21 implementation research datasets, mainly from the UK. Effects of setting (primary or secondary care), type of variable… CONTINUE READING
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