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A comparison of sta...
A comparison of standard and compositional data analysis in studies addressing group differences in sedentary behavior and physical activity
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- Gupta, Nidhi (författare)
- National Research Centre for the Working Environment, Copenhagen
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- Mathiassen, Svend Erik (författare)
- Högskolan i Gävle,Arbetshälsovetenskap,Centrum för belastningsskadeforskning
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- Mateu-Figueras, Gloria (författare)
- Department of Computer Science, Applied Mathematics and Statistics, University of Girona
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- Heiden, Marina (författare)
- Högskolan i Gävle,Arbetshälsovetenskap,Centrum för belastningsskadeforskning
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- Hallman, David (författare)
- Högskolan i Gävle,Arbetshälsovetenskap,Centrum för belastningsskadeforskning
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- Birk Jørgensen, Marie (författare)
- National Research Centre for the Working Environment, Copenhagen
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- Holtermann, Andreas (författare)
- National Research Centre for the Working Environment, Copenhagen
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(creator_code:org_t)
- 2018-06-15
- 2018
- Engelska.
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Ingår i: International Journal of Behavioral Nutrition and Physical Activity. - : Springer Science and Business Media LLC. - 1479-5868. ; 15:1
- Relaterad länk:
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https://doi.org/10.1...
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https://ijbnpa.biome...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Background. Data on time spent in physical activity, sedentary behavior and sleep during a day is compositional in nature, i.e. they add up to a constant value, typically 100% time. Compositional data have fundamentally different properties from unconstrained data in real space, and require other processing and analysis procedures, referred to as compositional data analysis (CoDA). Most physical activity and sedentary behavior studies, however, still apply analytical procedures adapted to data in real space, which can lead to misleading results. The present study describes a comparison of time spent sedentary and in physical activity between age groups and sexes, and investigates the extent to which results obtained by CoDA differ from those obtained using standard analytical procedures.Methods. Time spent sedentary, standing, and in physical activity (walking/running/stair climbing/cycling) during work and leisure was determined for 1-4 days among 677 blue-collar workers using accelerometry. Differences between sexes and age groups were tested using MANOVA, using both a standard approach and a CoDA approach based on isometric log-ratio transformed data. Results. When determining differences between sexes in time used for different activities at work, the effect size using standard analysis (η2=0.045, p<0.001) was 15% smaller than that obtained with CoDA (η2=0.052, p<0.001), although both approaches suggested a statistically significant difference. When determining corresponding differences between age groups, CoDA resulted in a 60% larger, and significant, effect size (η2=0.012, p=0.02) than that obtained with the standard approach (η2=0.008, p=0.07). During leisure, results with standard (age; η2=0.007, p=0.09; sex; η2=0.052, p<0.001) and CoDA (age; η2=0.007, p=0.09; sex; η2=0.051, p<0.001) analyses were similar.Conclusion. Results and, hence, inferences concerning differences by age and sex in time spent sedentary and in physical activity at work differed between CoDA and standard analysis. We encourage researchers to use CoDA in similar studies, in order to adequately account for the compositional nature of data on physical activity and sedentary behavior
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Arbetsmedicin och miljömedicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Occupational Health and Environmental Health (hsv//eng)
Nyckelord
- CoDA
- accelerometry
- MANOVA
- isometric log-ratio
- gender
- age groups
- Health-Promoting Work
- Hälsofrämjande arbete
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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