Adult ADHD Self-Report Scale (ASRS) Scoring Thresholds
For the 6-item ASRS screener (ASRS-6), a score of ≥4 items marked in the shaded "sometimes" or higher frequency range indicates a positive screen, while for quantitative scoring using 0-24 points, a cutoff of ≥12 points provides optimal sensitivity and specificity for adult ADHD screening 1, 2.
ASRS-6 Short Screener (Most Practical for Clinical Use)
The 6-item short screener outperforms the full 18-item version and should be your first-line screening tool 1. This abbreviated version demonstrated:
- Sensitivity: 96.7%
- Specificity: 91.1%
- Positive predictive value: 91.6%
- Negative predictive value: 96.5%
The original scoring method uses dichotomous responses where you count how many of the 6 questions fall into the shaded frequency ranges (typically "sometimes" or more frequent). If 4 or more of the 6 items are positive, this indicates a positive screen 1.
However, a quantitative scoring approach (0-4 points per item, total 0-24) with a cutoff of ≥12 points provides superior psychometric properties with a kappa index of 0.88 and area under the curve of 0.94 2.
Full ASRS-18 Scoring
For the complete 18-item ASRS, the evidence shows:
- The unweighted sum of dichotomous responses across all 18 questions can be used
- However, the 6-item screener actually outperformed the full 18-item version in the validation study (sensitivity 68.7% vs 56.3%, specificity 99.5% vs 98.3%) 1
- Area under the curve for the full ASRS-18 is 0.904, which is excellent but not superior to the short screener 3
Critical Caveats and Clinical Context
Major pitfall: The ASRS has substantial false-positive rates in general population screening. In community samples, the tool identified 17-26% as having probable ADHD when the true prevalence is ~2.5%, yielding a positive predictive value of only ~11.5% 4. This means:
- A positive screen does NOT confirm ADHD diagnosis
- The tool captures general impulsivity symptoms beyond ADHD
- You must follow positive screens with comprehensive clinical evaluation including:
- Childhood onset of symptoms (before age 12 per DSM-5)
- Collateral information from family/significant others (adults with ADHD often underestimate their symptoms) 5
- Ruling out bipolar disorder, depression, personality disorders, substance abuse, learning disabilities, and medical conditions 5
- Screening for impulse control disorders (gambling disorder, etc.) 4
Practical Algorithm
- Use the ASRS-6 screener with quantitative scoring (0-24 scale)
- Score ≥12 = positive screen requiring further evaluation 2
- Do not diagnose ADHD based on screening alone - proceed to structured clinical interview
- Obtain collateral history from someone who knew the patient in childhood
- Screen for substance use and comorbid psychiatric conditions
- Consider using the Wender Utah Rating Scale (WURS) in combination, which has even higher discriminatory properties (AUC 0.956) and captures childhood symptoms retrospectively 3
The ASRS-5 (DSM-5 version) shows similar properties with a suggested cutoff of >12 for screening purposes 6, though this was validated primarily in adolescent populations.