Javier Benítez-Porres1, Iván López-Fernández2, Juan Francisco Raya3, Sabrina Álvarez Carnero4, José Ramón Alvero-Cruz5, Elvis Álvarez Carnero6. 1. Biodynamic and Body Composition Laboratory, Faculty of Education Sciences, University of Malaga, Bulevar Louis Pasteur, 25, Campus of Teatinos, 29010, Málaga, Spain. benitez@uma.es. 2. Biodynamic and Body Composition Laboratory, Faculty of Education Sciences, University of Malaga, Bulevar Louis Pasteur, 25, Campus of Teatinos, 29010, Málaga, Spain. ivanl@uma.es. 3. San Sebastián Primary School, Av. de Mexico, S/N, 29650 Mijas, Málaga, Spain. juanfran_lee@yahoo.es. 4. Julio Gurriarán Primary School, Rúa Lugo, 2, 32300 O Barco, Galicia, Spain. sabrinaalcar@edu.xunta.es. 5. Sport Medicine School, Andalucía Tech, Faculty of Medicine, University of Malaga, Campus of Teatinos S/N, 29071, Málaga, Spain. alvero@uma.es. 6. Biodynamic and Body Composition Laboratory, Faculty of Education Sciences, University of Malaga, Bulevar Louis Pasteur, 25, Campus of Teatinos, 29010, Málaga, Spain. ecarnero@uma.es.
Abstract
BACKGROUND: Physical activity (PA) assessment by questionnaire is a cornerstone in the field of sport epidemiology studies. The Physical Activity Questionnaire for Children (PAQ-C) has been used widely to assess PA in healthy school populations. The aim of this study was to evaluate the reliability and validity of the PAQ-C questionnaire in Spanish children using triaxial accelerometry as criterion. METHODS: Eighty-three (N = 46 boys, N = 37 girls) healthy children (age 10.98 ± 1.17 years, body mass index 19.48 ± 3.51 kg/m(2) ) were volunteers and completed the PAQ-C twice and wore an accelerometer for 8 consecutive days. Reliability was analyzed by the intraclass correlation coefficient (ICC) and the internal consistency by the Cronbach's α coefficient. The PAQ-C was compared against total PA and moderate to vigorous PA (MVPA) obtained by accelerometry. RESULTS: Test-retest reliability showed an ICC = 0.96 for the final score of PAQ-C. Small differences between first and second questionnaire administration were detected. Few and low correlations (rho = 0.228-0.278, all ps < .05) were observed between PAQ-C and accelerometry. The highest correlation was observed for item 9 (rho = 0.311, p < .01). CONCLUSIONS: PAQ-C had a high reliability but a questionable validity for assessing total PA and MVPA in Spanish children. Therefore, PA measurement in children should not be limited only to self-report measurements.
BACKGROUND: Physical activity (PA) assessment by questionnaire is a cornerstone in the field of sport epidemiology studies. The Physical Activity Questionnaire for Children (PAQ-C) has been used widely to assess PA in healthy school populations. The aim of this study was to evaluate the reliability and validity of the PAQ-C questionnaire in Spanish children using triaxial accelerometry as criterion. METHODS: Eighty-three (N = 46 boys, N = 37 girls) healthy children (age 10.98 ± 1.17 years, body mass index 19.48 ± 3.51 kg/m(2) ) were volunteers and completed the PAQ-C twice and wore an accelerometer for 8 consecutive days. Reliability was analyzed by the intraclass correlation coefficient (ICC) and the internal consistency by the Cronbach's α coefficient. The PAQ-C was compared against total PA and moderate to vigorous PA (MVPA) obtained by accelerometry. RESULTS: Test-retest reliability showed an ICC = 0.96 for the final score of PAQ-C. Small differences between first and second questionnaire administration were detected. Few and low correlations (rho = 0.228-0.278, all ps < .05) were observed between PAQ-C and accelerometry. The highest correlation was observed for item 9 (rho = 0.311, p < .01). CONCLUSIONS:PAQ-C had a high reliability but a questionable validity for assessing total PA and MVPA in Spanish children. Therefore, PA measurement in children should not be limited only to self-report measurements.
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