No increase in response rate by adding a web response option to a postal population survey: a randomized trial.

J Med Internet Res · 2007 · PMC2270416 · PMID 18174120

Europe PMC DOI

hedged sentence

0.0010

closest p · 0.0× alpha

0.0010

boldest claim

The sentences

a significant trendP < .001actually significant

There was no age trend in response in the usual postal arm ( P = .23), but a significant trend in the postal plus optional Internet arm ( P < .001), driven by the lower response rate in the 20-24 age group.

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