Are People With ADHD Symptoms More Likely to Be Left-Handed?

The meta-analysis showed that people with ADHD had a statistically significant increase in non-right-handedness (left-handedness and mixed-handedness combined) compared to people without ADHD. People with ADHD had a 27.3% chance of being mixed- or left-handed compared to 18.1% of people without ADHD. What, however, was unclear in this meta-analysis, was whether attention deficit hyperactivity disorder symptoms (like hyperactivity and inattention symptoms) in people without a clear ADHD diagnosis are also linked to more left-handedness and mixed-handedness. They show that the association between ADHD and non-right-handedness is not limited to people with a clinical ADHD diagnosis. Instead, also children in the general population with hyperactivity or inattention problems have a higher chance of being left-handed or mixed-handed than children without those symptoms.