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Active-Q: Validation of the Web-Based Physical Activity Questionnaire Using Doubly Labeled Water
Karolinska Inst, Dept Med Epidemiol & Biostat, SE-17177 Stockholm, Sweden..
Karolinska Inst, Clin Epidemiol Unit, Dept Med, SE-17177 Stockholm, Sweden..
Karolinska Inst, Dept Med Epidemiol & Biostat, SE-17177 Stockholm, Sweden..
Karolinska Inst, Dept Med Epidemiol & Biostat, SE-17177 Stockholm, Sweden..
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2012 (English)In: Journal of Medical Internet Research, ISSN 1438-8871, E-ISSN 1438-8871, Vol. 14, no 1, article id e29Article in journal (Refereed) Published
Abstract [en]

Background: Increased use of the Internet provides new opportunities for collecting data in large studies. The aim of our new Web-based questionnaire, Active-Q, is to assess total physical activity and inactivity in adults. Active-Q assesses habitual activity during the past year via questions in four different domains: (1) daily occupation, (2) transportation to and from daily occupation, (3) leisure time activities, and (4) sporting activities. Objective: The objective of our study is to validate Active-Q's energy expenditure estimates using the doubly labeled water (DLW) method, and to assess the reproducibility of Active-Q by comparing the results of the questionnaire completed by the same group on two occasions. Methods: The validity and reproducibility of Active-Q were assessed in a group of 37 individuals, aged 20 to 65 years. Active-Q was distributed via email to the participants. The total energy expenditure of the participants was assessed using DLW for 11 consecutive days. Results: The median time to complete Active-Q was 6.1 minutes. The majority of participants (27/37, 73%) reported that the questionnaire was "easy" or "very easy" to answer. On average, Active-Q overestimated the total daily energy expenditure by 440 kJ compared with the DLW. The Spearman correlation between the two methods was r = 0.52 (P < .001). The intraclass correlation coefficient for total energy expenditure between the results of Active-Q completed on two occasions was 0.83 (95% CI 0.73-0.93). Conclusions: Active-Q is a valid and reproducible method of assessing total energy expenditure. It is also a user-friendly method and suitable for Web-based data collection in large epidemiological studies.

Place, publisher, year, edition, pages
JMIR PUBLICATIONS, INC , 2012. Vol. 14, no 1, article id e29
Keywords [en]
activity assessment, epidemiology, Internet, total energy expenditure
National Category
Health Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-40688DOI: 10.2196/jmir.1974ISI: 000301925700031PubMedID: 22356755OAI: oai:DiVA.org:mdh-40688DiVA, id: diva2:1246017
Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-09-06Bibliographically approved

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Bälter, Katarina

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