Assessing Attention-Deficit/Hyperactivity Disorder in Post-9/11 Veterans: Prevalence, Measurement Correspondence, and Comorbidity With Posttraumatic Stress Disorder

Abstract

Introduction: Attention-deficit/hyperactivity disorder (ADHD) is common among Veterans but overlapping symptoms with other prevalent psychiatric disorders (e.g., posttraumatic stress disorder [PTSD]) complicate diagnosis. This study aims to (1) assess the prevalence of ADHD, (2) evaluate the correspondence between ADHD self-report measures, and (3) examine the association between ADHD and PTSD in a sample of combat-deployed post-9/11 Veterans.

Materials and methods: A total of 332 combat-deployed post-9/11 Veterans from VA Boston Healthcare System completed the Clinician-Administered PTSD Rating Scale, 2 ADHD self-report questionnaires (Wender Utah Rating Scale-25 and the Adult ADHD Self-Report Scale v1.1), and report of the presence/absence of a historical ADHD diagnosis. Attention-deficit/hyperactivity disorder status via Wender Utah Rating Scale ([WURS-25] criterion standard) was compared to historical ADHD diagnosis and the ASRSv.1.1 screener. Log-binomial regression models assessed the relationship between ADHD and PTSD. This study was reviewed and approved by the VA Boston Institutional Review Board.

Results: In all, 12.7% of the sample met criteria for ADHD per the WURS-25. The WURS-25 demonstrated poor sensitivity with historical ADHD diagnosis (27.7%) but adequate specificity (90.3%). Poor sensitivity (60.7%) and specificity (60.8%) were observed between the WURS-25 and the ASRS-v.1.1. The prevalence of ADHD was 2.5 times as high for Veterans with a history of PTSD (Prevalence Ratio [PR] = 2.53, 95% CI: 1.11, 7.28) and over twice as high for those with current PTSD (PR = 2.19, 95% CI: 1.17, 4.38).

Conclusions: Attention-deficit/hyperactivity disorder is prevalent in this sample of Veterans and is associated with an increased risk of current and lifetime PTSD. The low correspondence across self-report ADHD measures illustrates the complexity of assessing ADHD in this highly comorbid population. When evaluating ADHD in Veterans, clinicians should carefully consider alternative and contributory symptom etiologies, such as PTSD, to ensure accurate diagnosis and treatment.