“…Overall, the results of studies investigating social differences in depression are hard to summarize due to methodological differences such as the measures used to assess depression as well as social position [ 7 , 9 , 11 , 14 , 15 , 17 – 20 , 26 , 27 ]. So far most studies on social position and poor mental health in adolescence have been based on psychiatric disorders overall [ 14 , 16 , 28 , 29 ], poor mental health overall [ 6 , 8 , 10 , 12 , 13 , 16 , 30 , 31 ], or self-reported depressive symptoms [ 7 , 9 , 11 , 15 – 17 , 19 , 26 , 32 ]. Only a few studies focus on diagnosed depression or mood disorders specifically [ 18 , 20 , 27 , 33 ].…”