Predominantly Inattentive ADHD (Formerly Known as ADD)
6 min read
Predominantly Inattentive ADHD — once called ADD — is the quietest and most frequently missed presentation of ADHD. Without the disruptive hyperactivity that draws attention, inattentive individuals often struggle invisibly for years, labelled as daydreamers, underachievers, or simply not trying hard enough.
What is inattentive ADHD?
The DSM-5 criteria require six or more inattention symptoms (five for adults) that are persistent, pervasive across settings, and causing functional impairment. Symptoms include: failing to give close attention to details, difficulty sustaining attention, not seeming to listen, failing to follow through on instructions, difficulty organising, avoiding tasks requiring sustained effort, losing things, being easily distracted, and forgetfulness in daily activities.
How it differs from Combined ADHD
People with Combined ADHD experience significant symptoms in both inattentive and hyperactive-impulsive clusters. Inattentive ADHD lacks the hyperactive component — the individual may appear calm, quiet, even passive. This makes it far harder to identify, particularly in girls and women who are socialised to mask their struggles.
Inattentive ADHD in women
Research consistently shows that inattentive ADHD is significantly underdiagnosed in females. Girls with inattentive ADHD often present as anxious, perfectionistic, or emotionally sensitive — masking difficulties through intense compensatory effort. By the time they receive a diagnosis, often in their 30s or 40s, many have spent decades believing they were fundamentally flawed.