title: Estimating physical activity using a cell phone questionnaire sent by means of short message service (SMS): a randomized population-based study.
abstract: 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 levels obtained when sending identical questions by web (n = 182) or paper (n = 211). The response rates were similar for the SMS, web and paper groups.
authors: Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden.
authors: Ylva Trolle
authors: YT
authors: Lagerros
authors: Sven
authors: S
authors: Sandin
authors: Christin
authors: C
authors: Bexelius
authors: Jan-Eric
authors: JE
authors: Litton
authors: Marie
authors: M
authors: Löf
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D040421:Cell Phone; D015444:Exercise; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D013548:Sweden; D060145:Text Messaging; D055815:Young Adult