Kohler, Simone, Behrens, Gundula 
, Olden, Matthias, Baumeister, Sebastian E, Horsch, Alexander , Fischer, Beate and 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.
Date of publication of this fulltext: 25 Jan 2018 11:30at publisher (via DOI)
Other URL: http://doi.org/10.2196/jmir.7620, http://www.jmir.org/2017/5/e186/
Dieser Artikel ist in einer Zeitschrift aus dem Directory of Open Access (DOAJ) publiziert.
Abstract
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 ...
Abstract
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.
Export bibliographical data
| Item type: | Article |
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| Date: | 30 May 2017 |
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| Institutions: | Medicine > Institut für Epidemiologie und Präventivmedizin |
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| Projects: | Open Access Publizieren (DFG) |
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| Identification Number: | | Value | Type |
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| 10.2196/jmir.7620 | DOI |
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| Keywords: | DOUBLY-LABELED WATER; ESTIMATING ENERGY-EXPENDITURE; ACTIVITY DIARY; HEART-RATE; ACTIVITY QUESTIONNAIRES; ACTIVITY MONITORS; FREQUENCY QUESTIONNAIRE; EPIDEMIOLOGIC RESEARCH; ACCELEROMETER OUTPUT; SEDENTARY BEHAVIORS; web-based method; validity; reliability; usability; lifestyle behavior; physical activity; sedentary behavior |
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| Dewey Decimal Classification: | 600 Technology > 610 Medical sciences Medicine |
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| Status: | Published |
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| Refereed: | Yes, this version has been refereed |
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| Created at the University of Regensburg: | Yes |
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| Item ID: | 36581 |
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