NightWare and Cardiovascular Health in Veterans With PTSD

Improving Cardiovascular Health in Veterans With PTSD by Treating Trauma-Related Nightmares With NightWare

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.

Study Overview

• Status: Recruiting
• Conditions: Cardiovascular Diseases; Endothelial Dysfunction; Vascular Stiffness; Nightmare; Autonomic Dysfunction; Post-traumatic Stress Disorder (PTSD); Veteran
• Intervention / Treatment: Device: NightWare

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 Type: Interventional
• Enrollment (Estimated): 125
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Kerrie L Moreau, PhD; Phone Number: (720) 885-1950; Email: Kerrie.Moreau@va.gov
• Study Contact Backup: Name: Claire Cox, BS; Phone Number: (303) 372-1396; Email: claire.cox@va.gov

Study Locations

• United States
  • Colorado
    • Aurora, Colorado, United States, 80045-7211
      • Recruiting
      • Rocky Mountain Regional VA Medical Center, Aurora, CO
      • Principal Investigator: Kerrie L Moreau, PhD
      • Contact: Claire Cox, BS; Phone Number: 303-372-1396; Email: claire.cox@va.gov

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

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 Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: NightWare active; Intervention with NightWare Therapeutic System	Device: NightWare; Nightware intervention app (enabled) will attempt to detect when an individual is having a nightmare based on a Nightware proprietary algorithm and attempt to disrupt the nightmare without awakening. In the sham comparator group the NightWare app will be disabled and not deliver an intervention.
Sham Comparator: NightWare Sham; NightWare app disabled; device will not deliver an intervention	Device: NightWare; Nightware intervention app (enabled) will attempt to detect when an individual is having a nightmare based on a Nightware proprietary algorithm and attempt to disrupt the nightmare without awakening. In the sham comparator group the NightWare app will be disabled and not deliver an intervention.

What is the study measuring?

Primary Outcome Measures

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

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in physiological sleep - total sleep time	Total sleep duration (minutes) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions
Change in endothelial function	Brachial artery flow mediated dilation (FMD) using ultrasound	Measured before and after 8 weeks of NightWare and sham conditions
Change in Autonomic function - spontaneous baroreflex sensitivity (BRS)	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.	Measured before and after 8 weeks of NightWare and sham conditions
Change in large elastic artery stiffness	Carotid-femoral pulse wave velocity (PWV)	Measured before and after 8 weeks of NightWare and sham conditions
Change in large elastic artery stiffness	Augmentation index and aortic blood pressure via pulse wave analysis	Measured before and after 8 weeks of NightWare and sham conditions
Change in autonomic function - heart rate variability (HRV)	Heart rate variability	Measured before and after 8 weeks of NightWare and sham conditions
Change in physiological sleep - wake after sleep onset	Wake after sleep (minutes) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions
Change in physiological sleep - sleep efficiency	Sleep efficiency (percentage) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions
Change in physiological sleep - REM sleep	REM sleep (minutes) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions
Change in physiological sleep - Deep sleep	Deep sleep (minutes) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions
Change in physiological sleep - Light sleep	Light sleep (minutes) calculated through ambulatory electroencephalography.	Measured before and after 8 weeks of NightWare and sham conditions

Collaborators and Investigators

• Sponsor: VA Office of Research and Development
• Investigators: Principal Investigator: Kerrie L Moreau, PhD, Rocky Mountain Regional VA Medical Center, Aurora, CO

Study record dates

Study Major Dates

• Study Start (Actual): September 10, 2025
• Primary Completion (Estimated): September 30, 2026
• Study Completion (Estimated): December 31, 2026

Study Registration Dates

• First Submitted: May 3, 2024
• First Submitted That Met QC Criteria: May 14, 2024
• First Posted (Actual): May 17, 2024

Study Record Updates

• Last Update Posted (Estimated): September 12, 2025
• Last Update Submitted That Met QC Criteria: September 11, 2025
• Last Verified: September 1, 2025

More Information

Terms related to this study

• Keywords: Oxidative stress; Cardiovascular Diseases; Nervous System Diseases; Sleep; Veteran; Stress Disorders, Post-Traumatic; Mental Disorders; Autonomic Nervous System Diseases; Primary Dysautonomias; sex/gender; Trauma and Stressor Related Disorders; aging, inflammation
• Additional Relevant MeSH Terms: Pathologic Processes; Stress Disorders, Traumatic; Pathological Conditions, Signs and Symptoms; Trauma and Stressor Related Disorders; Cardiovascular Diseases; Mental Disorders; Inflammation; Nervous System Diseases; Stress Disorders, Post-Traumatic; Autonomic Nervous System Diseases; Primary Dysautonomias
• Other Study ID Numbers: CARB-005-23F; CX002762-01A1 (Other Grant/Funding Number: Veterans Affairs); 24-0284 (Other Identifier: COMIRB)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: Yes
• product manufactured in and exported from the U.S.: Yes