Associations of Age, Gender, and Subtypes With ADHD Symptoms and Related Comorbidity in a Danish Sample of Clinically Referred Adults

The aim was to examine associations of age and gender with ADHD subtypes and subsequently to examine associations of age, gender, and subtypes with comorbid psychiatric disorders.Odds ratios were calculated and logistic regression performed using information from a clinical sample of 155 ADHD adults referred to a Danish specialized ADHD unit from 2010 to 2011.A majority of men (65%) was found in the sample. Most patients were subtyped ADHD combined (78%), followed by ADHD inattentive (18%), and ADHD hyperactive-impulsive (4%). No significant differences were found in gender and age across subtypes. Current comorbid disorders were found in 57% of the ADHD patients. Significantly more comorbidity was found in the ADHD combined type and in patients ≥25 years. Significantly more men had substance use disorders and significantly more women had personality disorders.When assessing adult ADHD patients' age, gender, subtype, and related comorbid symptom profiles should be taken into account.