The Adult ADHD Investigator Symptom Report Scale (AISRS) assesses each of the 18 individual symptoms of ADHD in DSM-IV on a Likert scale from 0 (not present) to 3 (severe), with a total possible score of 54.

The change in AISRS score from baseline to endpoint (12 weeks) was calculated as the later time point score minus the earlier time point score.