Later daily body clock timing in adults with ADHD and long-term trouble falling asleep

Adults with ADHD and sleep-onset insomnia (SOI) exhibited a delayed melatonin onset compared to both ADHD adults without SOI and healthy controls.

• Both groups of ADHD adults had longer sleep-onset latency and lower sleep efficiency compared to healthy controls.
• Adults with ADHD and SOI experienced a delayed start and end to their sleep period.
• A significant difference in melatonin onset timing was observed between adults with and without SOI (p = .006).
• Adults with ADHD and SOI showed an attenuated 24-hour amplitude in their rest-activity patterns.
• Those without SOI exhibited higher day-to-day stability in their activity patterns.

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