Impact of small group size on neighbourhood influences in multilevel models.

  title={Impact of small group size on neighbourhood influences in multilevel models.},
  author={Katherine P. Theall and Richard Scribner and Stephanie Broyles and Qingzhao Yu and Jigar K Chotalia and Neal Simonsen and Matthias Schonlau and Bradley P. Carlin},
  journal={Journal of epidemiology and community health},
  volume={65 8},
BACKGROUND Given the growing availability of multilevel data from national surveys, researchers interested in contextual effects may find themselves with a small number of individuals per group. Although there is a growing body of literature on sample size in multilevel modelling, few have explored the impact of group sizes of less than five. METHODS In a simulated analysis of real data, the impact of a group size of less than five was examined on both a continuous and dichotomous outcome in… CONTINUE READING

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