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Ethics review and use of reminder letters in postal surveys: are current practices compromising an evidence-based approach?

Stuart C Howell, Susan Quine and Nicholas J Talley
Med J Aust 2003; 178 (1): 43.
Published online: 6 January 2003

To the Editor: Survey data are difficult to publish when response rates fall below 60%. Reminder letters are the most reliable method of improving response rates in postal surveys,1,2 and three to four reminders are needed to achieve the 60% benchmark. The additional benefit of sending five or more reminders appears negligible, suggesting that four is the optimum number to maximise response rates using this approach.1

  • Stuart C Howell
  • Susan Quine
  • Nicholas J Talley


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