CONCLUSION: Our findings suggest that adolescents with ADHD have a marked preference for eveningness and suffer from more severe sleep disturbances than their healthy peers. Although morning blood melatonin levels did not differ between groups, the positive correlation between melatonin and sleep onset latency indicates that circadian dysregulation may play a role in ADHD-related sleep pathology. However, considering the study’s limitations, these results should be interpreted with caution….
