This estimate which differs significantly from other recent appraisals is based on data from 175 prior studies conducted over nearly four decades.
The approximation could help public health officials determine whether ADHD is overdiagnosed or underdiagnosed in their nation, state or community.
Children with ADHD, a neurodevelopmental disorder, tend to be inattentive, impulsive and hyperactive, which can cause them to struggle academically and socially. Symptoms often continue into adulthood.
Accurately determining ADHD prevalence is important, the study authors said, because exceptionally high estimates are met with skepticism and ridicule. This ends up hurting people impaired by the disorder.