A - 124 The Impact of Attention-Deficit/Hyperactivity Disorder (ADHD) on Cognition and Function in Post-9/11 Veterans with Post-Traumatic Stress Disorder (PTSD).

These findings suggest that PTSD has a larger impact on cognitive performance, specifically processing speed, and functioning than ADHD alone. However, when combined, ADHD compounds the effects of PTSD, resulting in worse functioning across multiple domains compared to Veterans who have only ADHD or PTSD.