How should I interpret the scores on the Adult ADHD Self‑Report Scale version 1.1 (ASRS‑v1.1)?

How to Interpret ASRS-v1.1 Scores

The ASRS-v1.1 is a screening tool only—a positive result requires comprehensive clinical evaluation including collateral information from family or close contacts, as adults with ADHD typically underestimate their symptom severity and functional impairment. 1

Scoring Methods and Cut-offs

Standard Dichotomous Scoring (Part A - 6 Questions)

• The original ASRS-v1.1 screener uses 6 questions (Part A) with specific thresholds for each item 2
• Mark responses of "sometimes," "often," or "very often" as positive for questions 1-3
• Mark responses of "often" or "very often" as positive for questions 4-6
• A positive screen requires ≥4 out of 6 items meeting threshold 2
• This method yields sensitivity of 79-100% and specificity of 70-91% across populations 3, 2

Alternative Quantitative Scoring (Full 18-Item Scale)

• Score each item from 0-4 points (never=0, rarely=1, sometimes=2, often=3, very often=4) 4
• Total possible score ranges from 0-72 points
• A cut-off of ≥12 points on the 6-item screener demonstrates optimal diagnostic accuracy (sensitivity 96.7%, specificity 91.1%) 4
• Mean normative score in US general population is 2.0 (SD=3.2), varying by age and sex 5

Clinical Context and Limitations

What the ASRS Cannot Do

• The ASRS does not establish an ADHD diagnosis—it only identifies individuals requiring further evaluation 1
• Self-report alone is insufficient because adults with ADHD characteristically lack insight into symptom severity 6, 1
• The scale cannot differentiate ADHD from conditions with overlapping symptoms (bipolar disorder, depression, borderline personality disorder, anxiety disorders, learning disabilities, narcolepsy, substance use disorders) 6, 1

Required Follow-up for Positive Screens

• Obtain detailed psychiatric and medical history documenting core ADHD symptoms beginning in childhood (before age 7 per DSM-IV criteria referenced in guidelines) 6
• Collect collateral information from spouse, parent, or significant other to verify symptom presence and severity 6, 1
• Document moderate-to-severe functional impairment in at least two settings (occupational/academic, social, family) 6
• Perform medical history, physical examination, and screening labs to exclude medical mimics 6
• Assess for comorbid conditions: depression (58% prevalence in ADHD), anxiety (53%), sleep difficulties (37%), and substance use disorders 5
• Consider urine drug screening given high comorbidity with substance abuse 6

Interpretation Pitfalls

Common Errors to Avoid

• Do not diagnose ADHD based solely on ASRS score—this violates the screening-only purpose of the instrument 1
• Do not skip collateral informant interviews, as self-report systematically underestimates impairment 6, 1
• Current symptomatology predicts functional impairment better than formal diagnosis status—symptomatic but undiagnosed individuals show comparable or worse quality of life outcomes 7
• The positive predictive value ranges from 18-92% depending on population prevalence, meaning many positive screens will not have ADHD upon full evaluation 3, 2, 4
• The negative predictive value is excellent (96-100%), making the ASRS most useful for ruling out ADHD when negative 3, 2, 4

Administration Considerations

• The screener takes approximately 54 seconds to complete, making it practical for busy clinical settings 2
• Psychometric properties remain valid across diverse populations including those with comorbid psychiatric conditions 8, 3
• No site-specific differences in performance have been identified 2