Estimating physical activity using a cell phone questionnaire sent by means of short message service (SMS): a randomized population-based study
作者： Ylva Trolle Lagerros , Sven Sandin , Christin Bexelius , Jan-Eric Litton , Marie Löf
DOI: 10.1007/S10654-012-9708-4
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摘要: An investigation in a randomized population-based Swedish study with 564 participants aged 18–80 years showed that mean physical activity levels obtained using short message service (SMS) by means of cell phones (n = 171) were equal to corresponding when sending identical questions web 182) or paper 211). The response rates similar for the SMS, and groups.
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