Results suggest there is moderate-to-high-level evidence that combined pharmacological and behavioral interventions , and pharmacological interventions alone can be effective in managing the core ADHD symptoms and academic performance at 14 months .
However , the effect size may decrease beyond this period .
This review has highlighted the paucity and limitations of the evidence investigating the long-term outcomes of recommended interventions for managing ADHD symptoms .
There is little evidence to suggest that the effects observed over the relatively short term are maintained throughout longer periods of impairment .
PURPOSE To systematic ally identify and review the currently available evidence on the long-term outcomes of recommended attention-deficit hyperactivity disorder ( ADHD ) interventions following r and omized controlled trials with children and young people .
Delinquent behavior and emerging substance use in the MTA at 36 months: prevalence, course, and treatment effects.
OBJECTIVE To compare delinquent behavior and early substance use between the children in the Multimodal Treatment Study of Children With ADHD ( MTA ; N = 487 ) and those in a local normative comparison group ( n = 272 ) at 24 and 36 months postr and omization and to test whether these outcomes were predicted by the r and omly assigned treatments and subsequent self-selected prescribed medications . METHOD Most MTA children were 11 to 13 years old by 36 months .  Delinquency seriousness was coded ordinally from multiple measures /reporters ; child-reported substance use was binary . RESULTS Relative to local normative comparison group , MTA children had significantly higher rates of delinquency ( e.g. , 27.1 % vs. 7.4 % at 36 months ; p = .000 ) and substance use ( e.g. , 17.4 % vs. 7.8 % at 36 months ; p = .001 ) . Children r and omized to intensive behavior therapy reported less 24-month substance use than other MTA children ( p = .02 ) . R and om effects ordinal growth models revealed no other effects of initial treatment assignment on delinquency seriousness or substance use . By 24 and 36 months , more days of prescribed medication were associated with more serious delinquency but not substance use . CONCLUSIONS Cause- and -effect relationships between medication treatment and delinquency are unclear ; the absence of associations between medication treatment and substance use needs to be re-evaluated at older ages . Findings underscore the need for continuous monitoring of these outcomes as children with attention-deficit/hyperactivity disorder enter adolescence
Results suggest there is moderate-to-high-level evidence that combined pharmacological and behavioral interventions , and pharmacological interventions alone can be effective in managing the core ADHD symptoms and academic performance at 14 months .
However , the effect size may decrease beyond this period .
This review has highlighted the paucity and limitations of the evidence investigating the long-term outcomes of recommended interventions for managing ADHD symptoms .
There is little evidence to suggest that the effects observed over the relatively short term are maintained throughout longer periods of impairment .
PURPOSE To systematic ally identify and review the currently available evidence on the long-term outcomes of recommended attention-deficit hyperactivity disorder ( ADHD ) interventions following r and omized controlled trials with children and young people .