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Table 1 Demographic characteristics of the study populations

From: Secular trends and regional variations in pharmacotherapy of attention-deficit/hyperactivity disorder (ADHD) among children and adolescents in Germany

Characteristics 2009 2010 2010 2012 2013 2014 2015 2016
Patients (n) 274,202 283,224 287,155 278,234 270,348 273,276 265,922 262,766
Sex (%)
 boys 69.5 69.6 69.5 70.9 73.0 73.3 74.3 74.3
 girls 20.1 20.7 21.1 21.7 22.5 23.2 23.9 24.1
 unknown 10.3 9.7 9.4 7.3 4.5 3.5 1.8 1.5
Age groups (%)
 5–6 6.5 6.5 6.1 5.9 5.8 6.7 6.6 6.5
 7–8 17.7 17.1 16.7 16.4 16.1 16.3 16.8 17.2
 9–10 27.4 26.9 26.1 25.7 25.4 25.3 25.2 25.4
 11–12 26.9 26.9 27.4 27.5 27.1 26.5 26.5 26.4
 13–14 21.5 22.6 23.6 24.5 25.5 25.2 24.9 24.5