ASRS Scale Administration and Interpretation
The Adult ADHD Self-Report Scale (ASRS-V1.1) is administered by having patients complete Part A (6 questions) first, with a positive screen defined as marking "often" or "very often" for 4 or more of the 6 questions 1.
Initial Screening: Part A
The ASRS-V1.1 Part A consists of 6 questions asking patients to rate the frequency of specific ADHD symptoms. This takes approximately 54 seconds to complete 2. The screening threshold is straightforward:
- Positive screen: 4 or more questions marked as "often" or "very often"
- Negative screen: Fewer than 4 questions marked as "often" or "very often"
The Part A screener has excellent operating characteristics with sensitivity of 91.4-100%, specificity of 71-96%, and area under the curve (AUC) of 0.90-0.94 3, 2, 4. The negative predictive value is 1.0, meaning a negative screen effectively rules out ADHD 2.
Follow-Up Assessment After Positive Screen
If Part A screens positive, proceed immediately to Part B of the ASRS to capture the full symptom profile 1. This expanded assessment provides detailed information about both inattentive and hyperactive-impulsive symptoms across all 18 DSM-5 criteria.
Additional Validation Steps
After completing Part B, obtain collateral information:
Have a close contact (parent, spouse, partner) complete the ASRS with the patient in mind to assess how symptoms impact relationships and are perceived by others 1
Administer a functional impairment scale such as the Weiss Functional Impairment Rating Scale-Self (WFIRS-S) to measure ADHD-specific impairment in daily functioning 1
Interpretation Framework
The ASRS is a screening tool, not a diagnostic instrument. A positive screen indicates the need for comprehensive diagnostic evaluation using DSM-5 criteria, which require:
- 5 or more symptoms of inattention and/or hyperactivity-impulsivity (for adults ≥17 years)
- Symptoms present for at least 6 months
- Onset before age 12 years
- Symptoms present in 2 or more settings
- Clear evidence of functional impairment
- Symptoms not better explained by another mental disorder 1
Clinical Considerations
The ASRS performs well even in populations with overlapping psychiatric symptoms 5. Studies show it maintains diagnostic accuracy (AUC 0.808-0.817) in patients with borderline personality disorder and bipolar disorder, though clinicians should remain vigilant about differential diagnosis 5.
The full ASRS-V1.1 (18 questions) has slightly better performance than the 6-question screener (AUC 0.904 vs 0.903), but the difference is minimal, making the short screener highly practical for busy clinical settings 3. The Wender Utah Rating Scale (WURS) has marginally better discriminatory properties (AUC 0.956) due to its retrospective childhood symptom focus, and combining both scales increases accuracy to AUC 0.964 6.
Current symptomatology matters more than diagnostic status for predicting functional impairment - patients who are symptomatic but undiagnosed show similar or worse quality of life outcomes compared to diagnosed patients 7. This underscores the importance of screening even when patients lack a formal ADHD diagnosis.