Fig. 1From: Health-related quality of life in Iranian adolescents: a psychometric evaluation of the self-report form of the PedsQL 4.0 and an investigation of gender and age differencesCategory Characteristic Curves for the highest discriminating item (item 8 of the physical functioning, item 3 of the emotional functioning, item 5 of the social functioning, and item 1 of the school functioning) and the lowest discriminating item (item 1 of the physical functioning, item 4 of the emotional functioning, item 1 of the social functioning, and item 4 of the school functioning) in each subscale of the PedsQL 4.0Back to article page