Validity, Reliability, and Calibration of the Physical Activity Unit 7 Item Screener (PAU-7S) at Population Scale
Use este enlace para citar
http://hdl.handle.net/2183/28543
A non ser que se indique outra cousa, a licenza do ítem descríbese como Atribución 4.0 Internacional
Coleccións
- GI-ESAFEX - Artigos [36]
- GI- ACOM - Artigos [24]
Metadatos
Mostrar o rexistro completo do ítemTítulo
Validity, Reliability, and Calibration of the Physical Activity Unit 7 Item Screener (PAU-7S) at Population ScaleAutor(es)
Data
2021-07-17Cita bibliográfica
Schröder, H., Subirana, I., Wärnberg, J. et al. Validity, reliability, and calibration of the physical activity unit 7 item screener (PAU-7S) at population scale. Int J Behav Nutr Phys Act 18, 98 (2021). https://doi.org/10.1186/s12966-021-01169-w
Resumo
[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 < 0.001). Spearman correlation and ICC coefficients of MVPA derived by the PAU-7S and accelerometers increased from 0.31 to 0.62 and 0.20 to 0.62, respectively, after calibration of the PAU-7S. Between-methods concordance improved from a weighted kappa of 0.24 to 0.50 after calibration. A slight reduction in ICC, from 0.62 to 0.60, yielded good predictive validity. Multiple linear regression models showed an inverse association of MVPA with standardized body mass index (β − 0.162; p < 0.077) and waist to height ratio (β − 0.010; p < 0.014). All validity dimensions were somewhat stronger in boys compared to girls.
Conclusion
The PAU-7S shows a good test-retest reliability and acceptable internal consistency. All dimensions of validity increased from poor/fair to moderate/good after calibration. The PAU-7S is a valid instrument for measuring MVPA in children and adolescents.
Palabras chave
Children and adolescents
Self-reported physical activity
Short PAQ
Validation
Accelerometry
Niños y adolescentes
Actividad física autodeclarada
Validación
Acelerometría
Nenos e adolescentes
Actividade física autodeclarada
Self-reported physical activity
Short PAQ
Validation
Accelerometry
Niños y adolescentes
Actividad física autodeclarada
Validación
Acelerometría
Nenos e adolescentes
Actividade física autodeclarada
Descrición
The online version contains supplementary material available at https://doi.org/10.1186/s12966-021-01169-w
Additional file 1 Supplementary Table 1.Characteristics of the validation study participants and the remaining participants of the population-based PASOS cohort. Additional file 2 Supplementary Table 2.Correlation coefficients and between-method agreement of moderate to vigorous physical activity measurements derived by the Physical Activity Unit 7-item screener, non-calibrated and calibrated, and the reference method (accelerometer),stratified by age
Versión do editor
Dereitos
Atribución 4.0 Internacional The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
ISSN
1479-5868