Fig. 1From: How body concerns, body mass, self-rated health and self-esteem are mutually impacted in early adolescence: a longitudinal cohort studyStudents participating in the longitudinal cohort study from elementary and junior high schools in the former county of Sogn og Fjordane from 2011 to 2013. The longitudinal study was part of two cross sectional studies in 2011 and 2013. Therefore, the total number of participants differs between the two yearsBack to article page