Advancing Identification of Circadian Delay in ADHD Youth: Associations With Clinical Heterogeneity and Cognition

Circadian Rhythm (Sleep Timing)

Time frame: Nightly for 7 nights (at-home assessment)

Wearable sensor data collection includes 3 sensors and supporting materials. The GreenTEG Core sensor will measure changes in core body temperature (CBT) beginning each evening and continuing through the night until morning waking. The Withings Mat will index times in/out of bed and related sleep metrics. The Garmin Vivosmart 5 will continuously measure movement and heart rate.

DLMO - Dim Light Melatonin Onset

Time frame: Day 8 (second in-person study visit)

Salivary melatonin will be collected during an in-lab assessment, occurring on Friday night following the home assessment. Eleven saliva samples (\~2ml) will be collected in a darkened environment every 30 min for a period beginning 4 hours before the child's average weeknight bedtime and extending to 1 hour after their average weeknight bedtime as verified by the previous week's sleep diary. The time at which salivary melatonin concentrations exceed 4 pg/mL will be used for determining DLMO. Circadian alignment will be measured via phase angle calculation, or the duration of time between DLMO and average bedtime as recorded by (1) sleep diary and (2) average sleep onset (actigraphy).

What is a clinical trial?

A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.

Is it safe to participate?

Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.

Will I be compensated?

Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.

Will I receive a placebo instead of treatment?

When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.

Can I leave a trial if I change my mind?

Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.

How long does a clinical trial last?

Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.