%0 Journal Article %T Fiabilidad y validez del cuestionario de actividad f¨ªsica PAQ-A en adolescentes espa£¿oles %A Mart¨ªnez-G¨®mez %A David %A Mart¨ªnez-de-Haro %A Vicente %A Pozo %A Tamara %A Welk %A Gregory J. %A Villagra %A Ariel %A Calle %A Marisa E. %A Marcos %A Ascensi¨®n %A Veiga %A Oscar L. %J Revista Espa£¿ola de Salud P¨²blica %D 2009 %I Ministerio de Sanidad y Consumo %R 10.1590/S1135-57272009000300008 %X background: questionnaires are feasible instruments to assess physical activity (pa) in large samples. the aim of the current study was to evaluate the reliability and validity of the paq-a questionnaire in spanish adolescents using the measurement of pa by accelerometer as criterion. methods: in a sample of 82 adolescents, aged 12 to 17 years, 1-week paq-a test-retest was administered. reliability was analyzed by the intraclass correlation coefficient (icc) and the internal consistency by the cronbach's ¦Á coefficient. two hundred thirty-two adolescents, aged 13-17 years, completed the paq-a and wore the actigraph gt1m accelerometer during 7-days. the paq-a was compared against total pa and moderate to vigorous pa (mvpa) obtained by the accelerometer. results: test-retest reliability showed icc = 0.71 for the final score of paq-a. internal consistency was ¦Á = 0.65 in the first self-report, ¦Á = 0.67 in the retest in 82 adolescents sample, and ¦Á = 0.74 in the 232 adolescents sample. the paq-a was moderately correlated with total pa (rho = 0.39) and mvpa (rho= 0.34) assessed by the accelerometer. the paq-a obtained significantly moderate correlations in boys but not in girls against the accelerometer. conclusions: the paq-a questionnaire shows an adequate reliability and a reasonable validity for assessing pa in spanish adolescents. %K physical activity %K adolescent %K questionnaire. %U http://www.scielosp.org/scielo.php?script=sci_abstract&pid=S1135-57272009000300008&lng=en&nrm=iso&tlng=en