There is conflicting evidence linking ADHD with socioeconomic status. While one study found a twofold increase in ADHD for the poorest children when compared with the wealthiest children,60 two other studies found no association between family income or education and rates of ADHD.14,15 Some recent, studies have shown lower rates of ADHD among Mexican-Americans residing in the US,60 and among Asian children in the UK.59
