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Validity and Calibration of the Youth Activity Profile
PURPOSE: The purpose of this study was to calibrate and cross-validate the Youth Activity Profile (YAP), a self-report tool designed to capture physical activity (PA) and sedentary behaviors (SB) in youth. METHODS: Eight schools in the Midwest part of the U.S. were involved and a total of 291 partic...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4668067/ https://www.ncbi.nlm.nih.gov/pubmed/26630346 http://dx.doi.org/10.1371/journal.pone.0143949 |
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author | Saint-Maurice, Pedro F. Welk, Gregory J. |
author_facet | Saint-Maurice, Pedro F. Welk, Gregory J. |
author_sort | Saint-Maurice, Pedro F. |
collection | PubMed |
description | PURPOSE: The purpose of this study was to calibrate and cross-validate the Youth Activity Profile (YAP), a self-report tool designed to capture physical activity (PA) and sedentary behaviors (SB) in youth. METHODS: Eight schools in the Midwest part of the U.S. were involved and a total of 291 participants from grades 4–12 agreed to wear an accelerometer (SWA Armband) and complete the YAP in two separate weeks (5–7 days apart). Individual YAP items capture PA behavior during specific segments of the week and these items were combined with temporally matched estimates of moderate-to-vigorous PA (MVPA) and sedentary time from the SWA to enable calibration. Quantile regression procedures yielded YAP prediction algorithms that estimated MVPA at School, MVPA at Out-of-School, MVPA on Weekend, as well as time spent in SB. The YAP estimates of time spent in MVPA and SB were cross-validated using Pearson product correlations and limits of agreement, as indicative of individual error and, equivalence testing techniques as indicative of group-level error. RESULT: Following calibration, the correlations between YAP and SWA estimates of MVPA were low to moderate (r(range) = .19 to .58) and individual-level YAP estimates of MVPA ranged from -134.9% to +110.0% of SWA MVPA values. Differences between aggregated YAP and SWA MVPA ranged from -3.4 to 21.7 minutes of MVPA at the group-level and predicted YAP MVPA estimates were within 15%, 20%, and 30%, of values from the SWA for the School, Out-of-School, and Weekend time periods, respectively. Estimates of time spent in SB were highly correlated with each other (r = .75). The individual estimates of SB ranged from -54.0% to +44.0% of SWA sedentary time, and the aggregated group-level estimates differed by 49.7 minutes (within 10% of the SWA aggregated estimates). CONCLUSIONS: This study provides preliminary evidence that the calibration procedures enabled the YAP to provide estimates of MVPA and SB that approximated values from an objective monitor. The YAP provides a simple, low-cost and educationally sound method to accurately estimate children’s MVPA and SB at the group level. |
format | Online Article Text |
id | pubmed-4668067 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-46680672015-12-10 Validity and Calibration of the Youth Activity Profile Saint-Maurice, Pedro F. Welk, Gregory J. PLoS One Research Article PURPOSE: The purpose of this study was to calibrate and cross-validate the Youth Activity Profile (YAP), a self-report tool designed to capture physical activity (PA) and sedentary behaviors (SB) in youth. METHODS: Eight schools in the Midwest part of the U.S. were involved and a total of 291 participants from grades 4–12 agreed to wear an accelerometer (SWA Armband) and complete the YAP in two separate weeks (5–7 days apart). Individual YAP items capture PA behavior during specific segments of the week and these items were combined with temporally matched estimates of moderate-to-vigorous PA (MVPA) and sedentary time from the SWA to enable calibration. Quantile regression procedures yielded YAP prediction algorithms that estimated MVPA at School, MVPA at Out-of-School, MVPA on Weekend, as well as time spent in SB. The YAP estimates of time spent in MVPA and SB were cross-validated using Pearson product correlations and limits of agreement, as indicative of individual error and, equivalence testing techniques as indicative of group-level error. RESULT: Following calibration, the correlations between YAP and SWA estimates of MVPA were low to moderate (r(range) = .19 to .58) and individual-level YAP estimates of MVPA ranged from -134.9% to +110.0% of SWA MVPA values. Differences between aggregated YAP and SWA MVPA ranged from -3.4 to 21.7 minutes of MVPA at the group-level and predicted YAP MVPA estimates were within 15%, 20%, and 30%, of values from the SWA for the School, Out-of-School, and Weekend time periods, respectively. Estimates of time spent in SB were highly correlated with each other (r = .75). The individual estimates of SB ranged from -54.0% to +44.0% of SWA sedentary time, and the aggregated group-level estimates differed by 49.7 minutes (within 10% of the SWA aggregated estimates). CONCLUSIONS: This study provides preliminary evidence that the calibration procedures enabled the YAP to provide estimates of MVPA and SB that approximated values from an objective monitor. The YAP provides a simple, low-cost and educationally sound method to accurately estimate children’s MVPA and SB at the group level. Public Library of Science 2015-12-02 /pmc/articles/PMC4668067/ /pubmed/26630346 http://dx.doi.org/10.1371/journal.pone.0143949 Text en © 2015 Saint-Maurice, Welk http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Saint-Maurice, Pedro F. Welk, Gregory J. Validity and Calibration of the Youth Activity Profile |
title | Validity and Calibration of the Youth Activity Profile |
title_full | Validity and Calibration of the Youth Activity Profile |
title_fullStr | Validity and Calibration of the Youth Activity Profile |
title_full_unstemmed | Validity and Calibration of the Youth Activity Profile |
title_short | Validity and Calibration of the Youth Activity Profile |
title_sort | validity and calibration of the youth activity profile |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4668067/ https://www.ncbi.nlm.nih.gov/pubmed/26630346 http://dx.doi.org/10.1371/journal.pone.0143949 |
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