Among stimulant medications classes, long-acting mixed amphetamine salts (MAS XR) and immediate-release mixed amphetamine salts showed a similar level of efficacy to short- or long-acting methylphenidates. The effectiveness of short- and long-acting stimulants did not differ from one another.
"The larger effect sizes we calculated for stimulant ADHD medications, compared to nonstimulants or the novel stimulant modafinil, leads us to conclude that amphetamine and methylphenidate based stimulant medications are more effective in treating symptoms of ADHD," said Stephen V. Faraone, Ph.D., lead researcher and director of child and adolescent psychiatry at SUNY Upstate Medical University. "Our results should help physicians who have had to rely on qualitative comparisons among published trials, along with their own clinical experience, to draw conclusions about an ADHD medication's relative efficacy because of largely absent direct head-to-head drug comparisons."
The researchers compared study outcomes using effect sizes, a commonly used, standard statistical measure to determine the magnitude of a particular effect resulting from an intervention, such as a drug used on a population, irrespective of the population size. Effect sizes are generally categorized as small (0.2), medium (0.5) and large (0.8). Standardized mean averages, or effect sizes, for dependent measures in each study were computed by taki
Contact: Darryl Geddes, SUNY Upstate Medical Center