University of Texas Southwestern Medical Center
This cross-sectional study examines associations among heart rate variability (HRV), emotional dysregulation, and parent-adolescent relationship quality in adolescents with Major Depressive Disorder (MDD). We hypothesize that lower HRV will be linked to greater emotional dysregulation and that more supportive parent-adolescent relationships will correlate with higher HRV. Participants will wear a Fitbit Charge 5 during nighttime sleep for 7 consecutive nights and complete validated measures of emotional regulation and relationship quality.
Inclusion Criteria: 1. Aged 12-18 years at the time of screening. 2. Current Major Depressive Disorder (MDD) documented in the electronic medical record by a licensed clinician; diagnosis verified using the Mental Health History - Parent Form. 3. Lives with a parent/legal guardian at least 50% of the time, confirmed on the Demographics Form. 4. Able and willing to provide assent, with a parent/legal guardian able and willing to provide informed consent. 5. Willingness to comply with all study procedures, including wearing a Fitbit Charge 5 for 7 nights, syncing the device through a compatible…
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