The effect of survey method on survey participation: analysis of data from the Health Survey for England 2006 and the Boost Survey for London.

BMC Med Res Methodol · 2010 · PMC2955656 · PMID 20868527

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a decreasing trendno p-value reported

A decreasing trend in survey participation rates has been reported in the USA [ 5 ] and several European countries over the last decades [ 6 - 11 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.