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Measuring physical activity in a cardiac rehabilitation population using a smartphone-based questionnaire

Pfaeffli, Leila, Maddison, Ralph, Jiang, Yannan, Dalleck, Lance and Löf, Marie 2013, Measuring physical activity in a cardiac rehabilitation population using a smartphone-based questionnaire, Journal of medical internet research, vol. 15, no. 3, pp. 1-11, doi: 10.2196/jmir.2419.

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Title Measuring physical activity in a cardiac rehabilitation population using a smartphone-based questionnaire
Author(s) Pfaeffli, Leila
Maddison, RalphORCID iD for Maddison, Ralph orcid.org/0000-0001-8564-5518
Jiang, Yannan
Dalleck, Lance
Löf, Marie
Journal name Journal of medical internet research
Volume number 15
Issue number 3
Start page 1
End page 11
Total pages 11
Publisher JMIR Publications
Place of publication Toronto, Ont.
Publication date 2013
ISSN 1438-8871
Keyword(s) Aged
Aged, 80 and over
Cardiovascular Diseases
Cell Phones
Female
Humans
Male
Microcomputers
Middle Aged
Motor Activity
New Zealand
Surveys and Questionnaires
Walking
Summary BACKGROUND: Questionnaires are commonly used to assess physical activity in large population-based studies because of their low cost and convenience. Many self-report physical activity questionnaires have been shown to be valid and reliable measures, but they are subject to measurement errors and misreporting, often due to lengthy recall periods. Mobile phones offer a novel approach to measure self-reported physical activity on a daily basis and offer real-time data collection with the potential to enhance recall.

OBJECTIVE: The aims of this study were to determine the convergent validity of a mobile phone physical activity (MobilePAL) questionnaire against accelerometry in people with cardiovascular disease (CVD), and to compare how the MobilePAL questionnaire performed compared with the commonly used self-recall International Physical Activity Questionnaire (IPAQ).

METHODS: Thirty adults aged 49 to 85 years with CVD were recruited from a local exercise-based cardiac rehabilitation clinic in Auckland, New Zealand. All participants completed a demographics questionnaire and underwent a 6-minute walk test at the first visit. Subsequently, participants were temporarily provided a smartphone (with the MobilePAL questionnaire preloaded that asked 2 questions daily) and an accelerometer, which was to be worn for 7 days. After 1 week, a follow-up visit was completed during which the smartphone and accelerometer were returned, and participants completed the IPAQ.

RESULTS: Average daily physical activity level measured using the MobilePAL questionnaire showed moderate correlation (r=.45; P=.01) with daily activity counts per minute (Acc_CPM) and estimated metabolic equivalents (MET) (r=.45; P=.01) measured using the accelerometer. Both MobilePAL (beta=.42; P=.008) and age (beta=-.48, P=.002) were significantly associated with Acc_CPM (adjusted R(2)=.40). When IPAQ-derived energy expenditure, measured in MET-minutes per week (IPAQ_met), was considered in the predicted model, both IPAQ_met (beta=.51; P=.001) and age (beta=-.36; P=.016) made unique contributions (adjusted R(2)=.47, F2,27=13.58; P<.001).There was also a significant association between the MobilePAL and IPAQ measures (r=.49, beta=.51; P=.007).

CONCLUSIONS: A mobile phone-delivered questionnaire is a relatively reliable and valid measure of physical activity in a CVD cohort. Reliability and validity measures in the present study are comparable to existing self-report measures. Given their ubiquitous use, mobile phones may be an effective method for physical activity surveillance data collection.
Language eng
DOI 10.2196/jmir.2419
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920499 Public Health (excl. Specific Population Health) not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Leila Pfaeffli et al.
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30081652

Document type: Journal Article
Collections: School of Exercise and Nutrition Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.