Are identified as having ADHD. Rates of diagnosis have increased typically 5.5 % per year from 2003 to 2007. The CDC has even more on ADHD.. ADHD overdiagnosed for youngest kids in class: Study Kids with attention deficit-hyperactivity disorder may be diagnosed due to problems paying attention, family history, or as fresh research suggests, because they’re more youthful than their classmates. PICTURES: Does your child really have ADHD? 17 what to rule out first A Canadian study has shown that the youngest kids in class are more likely to be diagnosed with ADHD and treated with medicine.Related StoriesMayo Clinic investigators discover novel mechanism linked to diabetes riskHeart attack individuals diagnosed and treated for diabetes knowledge improved cardiac outcomesNew Cleveland Clinic study shows bariatric surgery is safe option for managing type 2 diabetes in over weight or mildly obese patientsData on medical center admission for either a coronary attack or heart failing through the six-year research period were recorded and deaths were determined from a national database. Detailed analysis showed that individuals treated with pioglitazone acquired a significantly lower risk of heart failing and death in comparison to individuals treated with rosiglitazone, but there was no significant difference in the chance of heart attack.