What is the Wender Utah Rating Scale (WURS)?
The Wender Utah Rating Scale (WURS) is a 61-item retrospective self-report questionnaire that adults complete to describe their own childhood behaviors, specifically designed to aid in the retrospective diagnosis of childhood ADHD when evaluating adults for possible ADHD. 1
Purpose and Clinical Use
The WURS was developed to address a critical diagnostic challenge: establishing whether an adult had ADHD symptoms during childhood, which is required for diagnosing adult ADHD. Adults complete this scale by rating how they remember behaving and feeling as children (typically ages 6-10 years) 1.
Scale Versions and Structure
The original WURS contains 61 items, but several validated short versions exist:
- WURS-25: A 25-item version containing items that showed the greatest difference between ADHD patients and normal controls 1
- WURS-K (short form): A 21-item German version with excellent psychometric properties 2
- WURS-29: Another validated subset 3
Each item asks respondents to rate childhood symptoms on a Likert scale, covering domains such as inattention, hyperactivity, impulsivity, emotional lability, conduct problems, and mood symptoms 4.
Scoring and Interpretation
For the WURS-25, a cutoff score of 46 or higher correctly identifies 86% of ADHD patients and 99% of normal controls 1. However, more recent validation suggests:
- WURS-25: cutoff of 44 points
- WURS-K: cutoff of 24-36 points (depending on DSM-IV vs DSM-5 criteria)
- WURS-29: cutoff of 42-44 points 3
The German WURS-K demonstrates a sensitivity of 85% and specificity of 76% at a cutoff of 30 points 5.
Psychometric Properties
The WURS demonstrates excellent reliability:
- Internal consistency: α = 0.91 5
- Test-retest reliability over 4 weeks: r = 0.9 2, 6
- Split-half correlation: r = 0.85 5
Clinical Utility and Limitations
The WURS serves as a screening tool, not a diagnostic instrument. It helps identify adults who likely had childhood ADHD symptoms, but cannot replace comprehensive clinical evaluation. The scale shows moderate correlations with parents' retrospective ratings of childhood behavior 1, and WURS scores can predict response to stimulant medication 1.
Important caveat: Factor analysis reveals the WURS captures multiple childhood symptom domains beyond core ADHD symptoms, including conduct problems and emotional dysregulation. These childhood behaviors correlate with various adult psychiatric diagnoses including personality disorders and substance use disorders, not just ADHD 4. This means elevated WURS scores indicate childhood psychopathology broadly, requiring careful clinical interpretation.
The scale should be used as part of a comprehensive ADHD evaluation that includes structured clinical interviews and collateral information when available, though it provides valuable retrospective data when childhood records or parental reports are unavailable.