| Autor: |
Helmut Schröder, Isaac Subirana, Julia Wärnberg, María Medrano, Marcela González-Gross, Narcis Gusi, Susana Aznar, Pedro E. Alcaraz, Miguel A. González-Valeiro, Lluis Serra-Majem, Nicolás Terrados, Josep A. Tur, Marta Segú, Clara Homs, Alicia Garcia-Álvarez, Juan C. Benavente-Marín, F. Javier Barón-López, Idoia Labayen, Augusto G. Zapico, Jesús Sánchez-Gómez, Fabio Jiménez-Zazo, Elena Marín-Cascales, Marta Sevilla-Sanchez, Estefanía Herrera-Ramos, Susana Pulgar, María del Mar Bibiloni, Clara Sistac-Sorigué, Santiago F. Gómez |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
International Journal of Behavioral Nutrition and Physical Activity, Vol 18, Iss 1, Pp 1-12 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1479-5868 |
| DOI: |
10.1186/s12966-021-01169-w |
| Popis: |
Abstract Background Validation of self-reported tools, such as physical activity (PA) questionnaires, is crucial. The aim of this study was to determine test-retest reliability, internal consistency, and the concurrent, construct, and predictive validity of the short semi-quantitative Physical Activity Unit 7 item Screener (PAU-7S), using accelerometry as the reference measurement. The effect of linear calibration on PAU-7S validity was tested. Methods A randomized sample of 321 healthy children aged 8–16 years (149 boys, 172 girls) from the nationwide representative PASOS study completed the PAU-7S before and after wearing an accelerometer for at least 7 consecutive days. Weight, height, and waist circumference were measured. Cronbach alpha was calculated for internal consistency. Test-retest reliability was determined by intra-class correlation (ICC). Concurrent validity was assessed by ICC and Spearman correlation coefficient between moderate to vigorous PA (MVPA) derived by the PAU-7S and by accelerometer. Concordance between both methods was analyzed by absolute agreement, weighted kappa, and Bland-Altman statistics. Multiple linear regression models were fitted for construct validity and predictive validity was determined by leave-one-out cross-validation. Results The PAU-7S overestimated MVPA by 18%, compared to accelerometers (106.5 ± 77.0 vs 95.2 ± 33.2 min/day, respectively). A Cronbach alpha of 0.76 showed an acceptable internal consistency of the PAU-7S. Test-retest reliability was good (ICC 0.71 p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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