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Statistics Series

Statistical Applications in Orthodontics Part III. How Large a Study is Needed?

Pages 169-172 | Published online: 16 Dec 2014

References

  • Altman, D. G. (1980) Statistics and ethics in medical research. III. How large a sample? British Medical Journal, 281, 1336–1338.
  • Heasman, P. A., MacGregor I. D. M., Wilson, Z. and Kelly, P. J. (1998) Toothbrushing forces in children with fixed orthodontic appliances, British Journal of Orthodontics, 25, 187–190.
  • Machin, D. and Campbell, M. G. (1987) Statistical Tables for the Design of Clinical Trials,Blackwell, Oxford.
  • Newcombe, R. G. (2000a) Statistical methods in orthodontics. Part I. Confidence intervals: an introduction.Journal of Orthodontics, 27, 270–272.
  • Newcombe, R. G. (2000b) Statistical methods in orthodontics. Part II. Confidence intervals for proportions and their differences, Journal of Orthodontics, 27, 339–340.
  • nQuery Advisor, Release 3 (1998) Statistical Solutions, Cork.
  • Sargison, A. E., McCabe, J. F. and Millett, D. T. (1999) A laboratory investigation to compare enamel preparation by sandblasting or acid etching prior to bracket bonding.British Journal of Orthodontics, 26, 141–146.

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