Leandro Fornias Machado de Rezende, Catarina Machado Azeredo, Daniela Silva Canella, Rafael Moreira Claro, Inês Rugani Ribeiro de Castro, Renata Bertazzi Levy, Olinda do Carmo Luiz
Sociodemographic and behavioral factors associated with physical activity in Brazilian adolescents
BMC public health
sleep quality complex phenomenon quantitative subjective aspects vary adolescence prevalence sleep disorders known tunisia due lack validated tools translate validate questionnaire pittsburgh sleep quality index psqi tunisian arabic middle school students translated psqi tunisian arabic based translation backtranslation method conducted crosssectional study sample 560 adolescents exploratory factor analysis performed study construct validity test reliability global internal consistency scale computed construct validity verified factor analysis proving single factor explained 303 overall variance model produced good factor load components analysis reliability showed acceptable internal consistency cronbachs alpha06 arabic tunisian version psqi psychometrically valid measure psqi could useful detection evaluation symptoms sleep disorders well studies researches associated factors poor sleep quality adolescent youth