Reducing selection bias in a cluster randomized trial in West African villages

@article{Kerry2005ReducingSB,
  title={Reducing selection bias in a cluster randomized trial in West African villages},
  author={S. Kerry and F. Cappuccio and L. Emmett and J. Plange-Rhule and J. Eastwood},
  journal={Clinical Trials},
  year={2005},
  volume={2},
  pages={125 - 129}
}
Selection bias in cluster randomized trials may threaten the validity of the results. This bias may occur either at the level of the cluster or of the individual. We describe measures for maintaining comparability of intervention groups in a cluster randomized trial of a health education package to reduce dietary salt. The setting was 12 villages of the Ashanti region of Ghana. In total, 1896 villagers between 40 and 75 years of age were selected to take part in the trial using stratified… Expand
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