Design and Evaluation of a Computer-Based 24-Hour Physical Activity Recall (cpar24) Instrument

URN zum Zitieren dieses Dokuments: urn:nbn:de:bvb:355-epub-365813

Kohler, Simone, Behrens, Gundula, Olden, Matthias, Baumeister, Sebastian E, Horsch, Alexander, Fischer, Beate und Leitzmann, Michael F (2017) Design and Evaluation of a Computer-Based 24-Hour Physical Activity Recall (cpar24) Instrument. Journal of Medical Internet Research 19 (5), e186.

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Andere URL zum Volltext: http://doi.org/10.2196/jmir.7620, http://www.jmir.org/2017/5/e186/

Zusammenfassung

Zusammenfassung

Background:
Widespread access to the Internet and an increasing number of Internet users offers the opportunity of using Web-based recalls to collect detailed physical activity data in epidemiologic studies.

Objective:
The aim of this investigation was to evaluate the validity and reliability of a computer-based 24-hour physical activity recall (cpar24) instrument with respect to the recalled 24-h period.

Methods:
A random sample of 67 German residents aged 22 to 70 years was instructed to wear an ActiGraph GT3X+ accelerometer for 3 days. Accelerometer counts per min were used to classify activities as sedentary (<100 counts per min), light (100-1951 counts per min), and moderate to vigorous (≥1952 counts per min). On day 3, participants were also requested to specify the type, intensity, timing, and context of all activities performed during day 2 using the cpar24. Using metabolic equivalent of task (MET), the cpar24 activities were classified as sedentary (<1.5 MET), light (1.5-2.9 MET), and moderate to vigorous (≥3.0 MET). The cpar24 was administered twice at a 3-h interval. The Spearman correlation coefficient (r) was used as primary measure of concurrent validity and test-retest reliability.

Results:
As compared with accelerometry, the cpar24 underestimated light activity by −123 min (median difference, P difference <.001) and overestimated moderate to vigorous activity by 89 min (P difference <.001). By comparison, time spent sedentary assessed by the 2 methods was similar (median difference=+7 min, P difference=.39). There was modest agreement between the cpar24 and accelerometry regarding sedentary (r=.54), light (r=.46), and moderate to vigorous (r=.50) activities. Reliability analyses revealed modest to high intraclass correlation coefficients for sedentary (r=.75), light (r=.65), and moderate to vigorous (r=.92) activities and no statistically significant differences between replicate cpar24 measurements (median difference for sedentary activities=+10 min, for light activities=−5 min, for moderate to vigorous activities=0 min, all P difference ≥.60).

Conclusion:
These data show that the cpar24 is a valid and reproducible Web-based measure of physical activity in adults.

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Dokumentenart:

Artikel

Datum:

30 Mai 2017

Institutionen:

Medizin > Institut für Epidemiologie und Präventivmedizin

Projekte:

Open Access Publizieren (DFG)

Identifikationsnummer:

Wert	Typ
10.2196/jmir.7620	DOI

Stichwörter / Keywords:

web-based method; validity; reliability; usability; lifestyle behavior; physical activity; sedentary behavior

Dewey-Dezimal-Klassifikation:

600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin

Status:

Veröffentlicht

Begutachtet:

Ja, diese Version wurde begutachtet

An der Universität Regensburg entstanden:

Eingebracht am:

25 Jan 2018 11:30

Zuletzt geändert:

29 Jan 2018 08:25

Dokumenten-ID:

36581

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