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Non-response bias in physical activity trend estimates

<p>Abstract</p> <p>Background</p> <p>Increases in reported leisure time physical activity (PA) and obesity have been observed in several countries. One hypothesis for these apparently contradictory trends is differential bias in estimates over time. The purpose of this...

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Bibliographic Details
Main Authors: Bauman Adrian (Author), Griffiths Joe (Author), Cameron Christine (Author), Craig Cora L (Author), Tudor-Locke Catrine (Author), Andersen Ross E (Author)
Format: Book
Published: BMC, 2009-11-01T00:00:00Z.
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