Fig. 1

12-month prevalence of MDD 1997–1999 (GHS-MHS: German National Health Interview and Examination Survey 1998, mental health supplement, weighted for population structure as of 12/31/1997) vs. 2009–2012 (DEGS1-MH: German Health Interview and Examination Survey for Adults, mental health module, weighted for population structure as of 12/31/2010). Age range: 18–65; p-values: Rao-Scott chi-square test for testing differences between 1997–1999 and 2009–2012