Telephone follow-up to a mail survey: when to offer an interview compared to a reminder call.

BMC Med Res Methodol · 2012 · PMC3323423 · PMID 22433024

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did not reach statistical significanceno p-value reported

Discussion The response rates were five percentage points higher for the interview group than the reminder group using the conservative definition of a respondent (i.e., received both a completed survey and a signed form; however this difference did not reach statistical significance.

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