NightWare and Cardiovascular Health in Veterans With PTSD

Not Applicable

Not yet recruiting

• Conditions: Autonomic Dysfunction; Post-traumatic Stress Disorder (PTSD); Cardiovascular Diseases; Endothelial Dysfunction; Nightmare; Veteran; Vascular Stiffness
• Interventions: Device: NightWare

• Registration Number: NCT06419959
• Lead Sponsor: VA Office of Research and Development

Brief Summary

The purpose of this study is to learn more about the effectiveness of a prescription wrist-wearable device called NightWare (NW) on improving sleep in Veterans with nightmares related to posttraumatic stress disorder (PTSD). The investigators also want to learn whether it improves cardiovascular health among this population.

Detailed Description

Posttraumatic stress disorder (PTSD) is associated with profound health consequences in Veterans, including cardiovascular disease (CVD), the leading cause of death in adults in the United States. Trauma-related nightmares, a hallmark of PTSD, are a debilitating symptom that can lead to poor sleep quality and other health issues that ultimately cause clinically significant impairments in daily functioning. Recently, nightmares were reported to be an independent predictor of CVD in Veterans, for reasons that are unclear. Poor sleep is associated with increased CVD risk, possibly by impairing vascular health and nervous system function. Nightmare-related sleep disturbances are often resistant to first-line treatment (e.g., psychotherapy, medications) and even with improvements, residual nightmares and sleep disturbances often persist that still meet clinical significance. Moreover, significant barriers often exist including access to care and lack of trained providers, that prevent reaching and engagement of individuals to treatments, and there is poor adherence to interventions overall. As such, there is a need to implement interventions and/or complementary approaches that may appeal to Veterans experiencing PTSD-related nightmares who are looking for alternatives. In this regard, NightWare (NW) digital therapeutic is a novel smart watch application that was recently granted Breakthrough Device designation by the FDA for the treatment of nightmares in adults with PTSD. It uses the wearer's biometric data (i.e., heart rate, body movement and position) to distinguish normal and distressed sleep and interrupt nightmares. Preliminary evidence demonstrated an improvement in subjective sleep quality in Veterans after 30-days of NW compared with a sham condition. However, it is unknown whether NW improves sleep quality in Veterans with PTSD with co-morbid medical conditions such as obstructive sleep apnea (OSA) or in those using medications (e.g., prazosin) to treat nightmares related to PTSD. It is also unknown if the effects of NW on sleep are similar in male and female Veterans, or whether improvements in sleep with NW result in improvements in objective sleep (i.e., sleep physiology) or cardiovascular health. In this context, this study will determine if 8 weeks of NW improves subjective sleep in Veterans with PTSD-related nightmares, including those with OSA and/or taking medications to treat PTSD related nightmares (e.g., prazosin). The change in Pittsburgh Sleep Quality Index (PSQI) scores from baseline to 8 weeks will be measured. Additional goals will evaluate changes in cardiovascular health outcomes with NW use and if there are potential sex differences in the response to NW. The proposed research is a high priority topic of the Veterans Affairs, as PTSD affects 11-23% of Veterans in a given year. The research is highly innovative and if successful will lead to significant advances in the healthcare of Veterans, particularly as it relates to the treatment of PTSD-related nightmares.

Study Timeline

• Study First Submitted: 2024-05-03
• Study First Submitted QC: 2024-05-14
• Study First Posted: 2024-05-17
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-18
• Last Update Posted: 2025-03-19
• Study Start: 2025-04-21
• Primary Completion: 2026-09-30
• Study Completion: 2026-09-30

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 125

Inclusion Criteria

1. Diagnosis of PTSD via American Psychiatric Association PTSD diagnostic criteria in the fifth edition of its Diagnostic and Statistical Manual of Mental Disorders (DSM-5).
2. Self-report having repetitive nightmares contributing to disrupted sleep;
3. Age 22 years (rationale is because the device has only been used in adults in 22 years and older);
4. Resting blood pressure (BP, <160/100 mmHg);
5. Fasted glucose <126 mg/dL;
6. Poor overall sleep quality as indicated by a Pittsburgh Sleep Quality Index (PSQI) score 6 or higher;
7. Epworth Sleepiness Scale (ESS): Question #8 score above "0" will prompt an additional question: Do you drive ("get behind the wheel") when you are drowsy? The answer must be "No" to be enrolled in the study due to safety concerns;
8. Wireless Internet and two power outlets in sleeping location;
9. Willingness not to use any other application which collects heart rate data on the phone and watch that is used for NightWare;

Exclusion Criteria

1. Unstable medical condition (e.g., uncontrolled hypertension or active CVD or cancer);
2. Active infection (note, anyone with an active infection would become eligible once the infection has ended);
3. Thyroid dysfunction, defined as an ultrasensitive TSH <0.5 or >5.0 mU/L; volunteers with abnormal TSH values will be re-considered for participation in the study after follow-up evaluation by the PCP with initiation or adjustment of thyroid hormone replacement; or other problems that would interfere with participation in the study;
4. Use of insulin or sulfonylureas
5. Pregnancy or currently breast feeding;
6. Current history (past 3 months) of substance (excluding marijuana) or alcohol abuse per the SCID-5. Adults with past substance or alcohol use disorders will be allowed to participate;
7. Participants will be excluded if they report elevated acute risk for suicidal self-directed violence warranting immediate hospitalization (e.g., suicidal ideation with intent, evaluated by the Columbia-Suicide Severity Rating Scale [C-SSRS]).
8. Shift workers (due to circadian rhythm disruption);
9. Diagnosis of active disorder of arousal from non-rapid eye movement sleep, rapid eye movement sleep behavior disorder, or narcolepsy;
10. Nocturia that causes awakening from sleep;
11. Known sleep walking or acting out dreams (contraindication to NW use);
12. Diagnosis or suspicion of dementia;
13. Seizure disorder
14. Participants experiencing severe cognitive impairment or current psychiatric symptoms of such severity that would preclude participation (e.g., active psychosis, imminently suicidal)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
NightWare Sham	NightWare	NightWare app disabled; device will not deliver an intervention
NightWare active	NightWare	Intervention with NightWare Therapeutic System

Primary Outcome Measures

Name	Time	Method
Change in Pittsburgh Sleep Quality Index	Measured before and after 8 weeks of NightWare and sham conditions	Sleep questionnaire with a scale of 0 to 21 with a higher score indicating a significant sleep disturbance

Secondary Outcome Measures

Name	Time	Method
Change in physiological sleep - wake after sleep onset	Measured before and after 8 weeks of NightWare and sham conditions	Wake after sleep (minutes) calculated through ambulatory electroencephalography.
Change in physiological sleep - total sleep time	Measured before and after 8 weeks of NightWare and sham conditions	Total sleep duration (minutes) calculated through ambulatory electroencephalography.
Change in large elastic artery stiffness	Measured before and after 8 weeks of NightWare and sham conditions	Augmentation index and aortic blood pressure via pulse wave analysis
Change in autonomic function - heart rate variability (HRV)	Measured before and after 8 weeks of NightWare and sham conditions	Heart rate variability
Change in physiological sleep - REM sleep	Measured before and after 8 weeks of NightWare and sham conditions	REM sleep (minutes) calculated through ambulatory electroencephalography.
Change in physiological sleep - Deep sleep	Measured before and after 8 weeks of NightWare and sham conditions	Deep sleep (minutes) calculated through ambulatory electroencephalography.
Change in endothelial function	Measured before and after 8 weeks of NightWare and sham conditions	Brachial artery flow mediated dilation (FMD) using ultrasound
Change in Autonomic function - spontaneous baroreflex sensitivity (BRS)	Measured before and after 8 weeks of NightWare and sham conditions	Cardiovagal baroreflex sensitivity (cBRS) measured using beat-to-beat time series of systolic blood pressures (finger photo-plethysmography) and R-R interval (three-lead electrocardiogram) will be recorded simultaneously at 1,000 Hz.
Change in physiological sleep - sleep efficiency	Measured before and after 8 weeks of NightWare and sham conditions	Sleep efficiency (percentage) calculated through ambulatory electroencephalography.
Change in physiological sleep - Light sleep	Measured before and after 8 weeks of NightWare and sham conditions	Light sleep (minutes) calculated through ambulatory electroencephalography.

Trial Locations

Locations (1)

Rocky Mountain Regional VA Medical Center, Aurora, CO; 🇺🇸 Aurora, Colorado, United States