NCT05195359

Brief Summary

The study is a single-blinded randomized waitlist controlled trial that aims to assess changes in objective and self-report sleep improvement through use of a dynamic and personalized sleep improvement smartphone app and advice engine in those with poor sleep (i.e., subclinical threshold insomnia) when compared to a waitlist control group after 6 weeks and 12 weeks.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
637

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Jan 2023

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

December 3, 2021

Completed
2 months until next milestone

First Posted

Study publicly available on registry

January 19, 2022

Completed
1 year until next milestone

Study Start

First participant enrolled

January 31, 2023

Completed
7 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

August 15, 2023

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

August 15, 2023

Completed
2.3 years until next milestone

Results Posted

Study results publicly available

November 26, 2025

Completed
Last Updated

November 26, 2025

Status Verified

November 1, 2025

Enrollment Period

7 months

First QC Date

December 3, 2021

Results QC Date

September 18, 2023

Last Update Submit

November 14, 2025

Conditions

Keywords

SleepSmartphone ApplicationPreventative Health

Outcome Measures

Primary Outcomes (2)

  • Change in SF B Sleep Quality From Baseline to 6 Weeks

    SF B Sleep Quality (SQ): SF B (Görtelmeyer). Range 1-5; higher = better sleep quality.

    Baseline and 6 weeks

  • Change in SF B Sleep Quality From Baseline to 12 Weeks

    SF B Sleep Quality (SQ): SF B (Görtelmeyer). Range 1-5; higher = better sleep quality.

    Baseline and 12 weeks

Secondary Outcomes (8)

  • Changes in Overall Sleep Problems From Baseline to 6 Weeks

    Baseline and 6 weeks

  • Changes in Feeling of Being Refreshed in the Morning From Baseline to 6 Weeks

    Baseline and 6 weeks

  • Changes in Health Measures From Baseline to 6 Weeks

    Baseline and 6 weeks

  • Changes in Mental Health Stress From Baseline to 6 Weeks

    Baseline and 6 weeks

  • Changes in Overall Sleep Problems From Baseline to 12 Weeks

    Baseline and 12 weeks

  • +3 more secondary outcomes

Study Arms (2)

Allocation to Sleep Improvement App

ACTIVE COMPARATOR

Participants will be instructed to engage with the Dein Schlaf. Dein Tag. smartphone app, log their behaviors in-app, and track their sleep daily for the duration of the study (12 weeks). Participants will be instructed to start the sleep tracking device via their iOS device before lying down in bed and turning off the lights to go to sleep. In the morning, participants will turn off the sleep tracking device as soon as they wake up and decide to leave the bed. At the three time points (baseline, 6 weeks, and 12 weeks), participants will be instructed to complete online assessments on self-reported sleep quality, health perception, psychosocial factors and sleep-permissive behaviors (i.e., preventative health)

Behavioral: Dein Schlaf. Dein Tag. sleep improvement application powered by SleepScore

Allocation to Waitlist Control Group

NO INTERVENTION

At the three time points (baseline, 6 weeks, and 12 weeks) participants assigned to the wait-list control group will be instructed to complete online assessments on self-reported sleep quality, health perception, psychosocial factors and sleep-permissive behaviors (i.e., preventative health)

Interventions

The Dein Schlaf. Dein Tag. application powered by SleepScore is a validated sleep measurement application using sonar technology that also provides evidenced-based sleep advice and sleep education content based on a user's objectively measured nightly sleep data. As participants engage with the app, the Dein Schlaf. Dein Tag. application provides personalized and dynamic sleep content and sleep and circadian rhythm improvement advice based in the principles of sleep hygiene, sleep-circadian science, and cognitive behavioral psychology. Participants will also receive personalized sleep challenges tailored to improve their sleep and circadian rhythms. Each challenge lasts for 7 tracked nights, ranging from optimizing sleep habits to limiting caffeine intake, and more. Additional sleep improvement features embedded within the app include sleep sanctuary bedroom checks, sleep sounds, smart alarms, bedtime reminders, and sleep education blogs and science content.

Also known as: SleepScore Mobile App, Dein Schlaf. Dein Tag. App
Allocation to Sleep Improvement App

Eligibility Criteria

Age18 Years+
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • iOS user
  • Sub-clinical threshold insomnia symptoms (Regensburg Insomnia Scale Score 13-24)
  • ≥ 18 years old.
  • Naive to the SleepScore Labs App
  • Able to fully understand information on data protection and provide written informed consent

You may not qualify if:

  • Non-iOS device users due to technical restrictions of the application
  • Bedtime less than 6 hours
  • Any of the following medical problems:
  • Untreated psychological disorder affecting sleep (e.g., depression, anxiety disorders, bipolar disorder, schizophrenia)
  • Current severe medical conditions (e.g. chronic pain, cancer)
  • Any of the following medications/substance use:
  • Prescription sleep medications or regular use of over-the-counter sleep medications
  • Medication for other conditions (e.g., anxiety, ADHD) that affect sleep, e.g. antidepressants, antipsychotics
  • Consumption of 3+ units of alcohol on 4 or more nights per week
  • Recreational or nightly drug use
  • Pregnant or nursing mothers
  • Shift work
  • Travel across 2 or more time zones during study period
  • Sleeping more than 7 nights not at home during study period
  • Users who newly received a diagnosis of a sleep disorders
  • +2 more criteria

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Ruhrlandklinik Essen

Essen, North Rhine-Westphalia, 45239, Germany

Location

MeSH Terms

Conditions

Health Behavior

Condition Hierarchy (Ancestors)

Behavior

Results Point of Contact

Title
Susanne Fischer / Sr. Manager Clinical Research
Organization
Resmed Germany Inc

Study Officials

  • Christoph Schoebel, Prof

    Ruhrlandklinik Essen

    PRINCIPAL INVESTIGATOR

Publication Agreements

PI is Sponsor Employee
No
Restrictive Agreement
No

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
INVESTIGATOR, OUTCOMES ASSESSOR
Purpose
PREVENTION
Intervention Model
PARALLEL
Model Details: Single-blinded Randomized Waitlist Controlled Trial
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR

Study Record Dates

First Submitted

December 3, 2021

First Posted

January 19, 2022

Study Start

January 31, 2023

Primary Completion

August 15, 2023

Study Completion

August 15, 2023

Last Updated

November 26, 2025

Results First Posted

November 26, 2025

Record last verified: 2025-11

Data Sharing

IPD Sharing
Will not share

There is no plan to share IPD as data analysis will be conducted internally and raw IPD will not be shared with external researchers.

Locations