Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka
School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study
BMC public health
selfmanagement health requires skills obtain process understand use healthrelated information assessment adolescents functional health literacy requires valid reliable lowburden tools main objective study adapt study psychometric properties newest vital sign portuguese adolescents population nvspteen classic psychometric indicators reliability validity combined item response theory irt analyses crosssectional survey complemented 3month testretest assessment nvspteen selfadministered students enrolled grades 8 12 12 17 years old school setting overall 386 students 191 girls 16 classes school participated study mean age 145 sd 15 internal reliability nvspteen 060 nvspteen total score positively significantly correlated portuguese r 028 mathematics scores r 031 school years r 031 age r 019 similar original scale us nvspteen composed two dimensions readingrelated literacy numeracy temporal reliability adequate though learning effect irt analyses revealed differences difficulty discriminative capacity among items adequate outfit infit values results showed nvspteen valid reliable sensible interindividual educational differences adequate regular screening functional health literacy adolescents