Fig. 2From: Cross-country comparisons of trends in adolescent psychosomatic symptoms – a Rasch analysis of HBSC data from four Nordic countriesa Category probability curve for item “Have been irritable or in a bad temper” for set of eight items with five response categories. b Category probability curve for item “Backache” for set of eight items with five response categories. Entire sample of students 11, 13 and 15 years oldBack to article page