Fig. 2From: Body mass index is associated with health-related quality of life and disease characteristics in young adults with juvenile idiopathic arthritisRelationships of dimensions of health-related quality of life as the function of the BMI in the 18-year follow-up visit. The curves were derived from 3-knot restricted cubic splines regression models. The models were adjusted for age, sex and diagnosis. The grey area represents a 95% confidence interval. Age- and gender-matched healthy controls from the study by Aalto et al. [21]shown by the dashed linesBack to article page