The Collaborative Multisite Multi-modal Treatment Study of Children With ADHD (MTA) study examined ADHD behavior outcomes of 579 children that were each enrolled in one of four forms of treatment: medication alone, behavioral intervention alone, behavioral intervention plus medication, and standard community care. After 14 months, the study subjects could then continue community care if they chose.
The children that participated in the study have now been evaluated 8 years after the end of the study. The study found that short-term treatment, while effective during use, needs to be kept up long-term to see benefits.

Short, Intensive ADHD Treatments are Not Long-Term Panacea