1. 148,581 Swedish patients were studied for ADHD treatment outcomes.
2. Early treatment (within 3 months) correlated with lower rates of adverse behaviors.
3. 57% of patients medication started, mainly with methylphenidate.
4. Statistically significant reductions observed in recurrent events.
5. Stimulants associated with greater risk reductions compared to non-stimulants.
6. Limitations included lack of data on non-drug treatments and ADHD subtypes.
7. Results may not generalize beyond Sweden.

Source: The BMJ