Objectives:
To evaluate changes in the intensity of ADHD symptoms and size effects after the completion of the twelve-week “Workshops for Parents of Hyperactive Children”.

Methods:
Intervention group included parents (N = 199) of children and adolescents diagnosed with ADHD, who completed the twelve-week parental training. The reference group included parents (N = 24) of children and adolescents diagnosed with ADHD, who received 1–2 standard psychiatric visits within twelve weeks (treatment-as-usual). The following questionnaires were completed by the participants at the beginning and at the end of the training: CBCLand Conners-IOWA-10 (parent’s assessment of the child), TRF and Conners-RCTRS-28 (assessment of the child by the teacher/educator), and YSR (in children of 11 years and over). The same diagnostic regime was used in the reference group – the patients were assessed during the first visit and after twelve weeks.

Results:
The majority of attendees were parents of boys diagnosed with: ADHD mixed type with or without ODD and ADHD predominantly inattentive type. The intervention resulted in significant reduction of inattentive-impulsive-hyperactive and oppositional-defiant symptoms in Conners-IOWA-10 and significant reduction of symptoms in the following CBCL scales: “Social problems”, “Attention problems”, “Aggressive behavior”, “Externalizing behavior”, as well as the overall score, as rated by mothers. The improvement was age, diagnosis and pharmacotherapy independent.

Conclusions:
The therapeutic program used in our study resulted in small to moderate reduction of symptoms in children and adolescents with attention deficit hyperactivity disorder irrespective of subtype, comorbid disorders or pharmacotherapy (if implemented).