Which disorder is characterized by a pattern of inattention and/or hyperactivity-impulsivity?

Attention-Deficit/Hyperactivity Disorder (ADHD) is defined by the presence of a consistent pattern of inattention and/or hyperactivity-impulsivity. This disorder affects both children and adults, and the symptoms can manifest in various ways, such as difficulty sustaining attention, trouble organizing tasks, forgetfulness, fidgeting, or an inability to remain seated in situations where it's expected.

ADHD is specifically characterized by these behaviors, which can lead to significant challenges in academic, occupational, and social settings. By contrast, anxiety disorders primarily focus on excessive worry and fear, post-traumatic stress disorder involves re-experiencing trauma and avoidance behaviors, and major depressive disorder is centered on persistent feelings of sadness, loss of interest, and other emotional symptoms. Each of these conditions has distinct criteria that do not include the specific combination of inattention and hyperactivity-impulsivity that defines ADHD.