Finding: For the entire sample, there were no differences in symptom trajectories between study arms; mean differences in change scores at 12 months were –0.14 (95% confidence interval –0.34 to 0.07) for inattention; –0.13 (–0.31 to 0.05) for hyperactivity/impulsivity; –0.09 (–0.28 to 0.11) for oppositionality; and 3.30 (–1.23 to 7.82) for social skills.
Certainty (1-5): 6