Sample size considerations for studies of intervention efficacy in the occupational setting.

@article{Lazovich2002SampleSC,
  title={Sample size considerations for studies of intervention efficacy in the occupational setting.},
  author={Deann Lazovich and David M Murray and Lisa M. Brosseau and David L. Parker and F Thomas Milton and Siobhan K Dugan},
  journal={The Annals of occupational hygiene},
  year={2002},
  volume={46 2},
  pages={219-27}
}
OBJECTIVE Due to a shared environment and similarities among workers within a worksite, the strongest analytical design to evaluate the efficacy of an intervention to reduce occupational health or safety hazards is to randomly assign worksites, not workers, to the intervention and comparison conditions. Statistical methods are well described for estimating the sample size when the unit of assignment is a group but these methods have not been applied in the evaluation of occupational health and… CONTINUE READING

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