ClinicalTrials.gg
CompletedNCT04191668Updated Mar 30, 2021Results posted

A Validation Study of the NightOwl PAT-based Home Sleep Apnea Test

An interventional study of NightOwl in Sleep Apnea, sponsored by Ectosense NV. Completed at 3 sites in United States. Open to participants aged 13 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-03-30.

Sponsored by Ectosense NV (part of ResMed) · Not applicable, Interventional, and Diagnostic

Phase
Not applicable
Study type
Interventional
Enrollment
106
Allocation
Not applicable
Ages
13 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 369 studies in Sleep Apnea Syndromes with a site in United States — 49 open to participants now, 60 under way, 3 of them phase 3. Sleep Apnea Syndromes · United States.

Enrollment
94th of 284
106 · median 62
Started
2019
with 21 others
No phase
193 of 369
22 open now
Registered
264th of 369
by date

Among the 369 studies in Sleep Apnea Syndromes with a site in United States, this one is the 94th largest by enrollment of the 284 interventional ones that give a count, is one of 22 that started in 2019, is one of 193 with no phase, and was the 264th registered.

Sleep Apnea Syndromes

1,084 studies on the registry are indexed under Sleep Apnea Syndromes; 171 are open to participants now.

Browse Sleep Apnea Syndromes studies →

Open to participants now

49 of the 369 studies in Sleep Apnea Syndromes with a site in United States are open now. Recruiting first, the newest first:

44 more — sign in →

All 49 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 117 Sleep Apnea Syndromes studies recruiting now, 57 (49%) set no upper age limit and 36 (31%) stop at 75 or younger; 24 take children under 18; 27 take healthy volunteers.

This study: 13 Years and older · all sexes · healthy volunteers too.

The full table on the hub →

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02

Study summary

The objective of this study is to evaluate the performance of a miniaturized sleep apnea test, called NightOwl. The system consists of a sensor placed on the fingertip and a cloud-based analytics software. The sensor acquires accelerometer and photoplethysmographic data. The software derives actigraphy from the former, and blood oxygen saturation and peripheral arterial tone (PAT), among other features, from the latter. In order to assess NightOwl's performance, the investigators will compare the respiratory event index (REI), defined as the number of respiratory events per hour of sleep, derived by the NightOwl system, to the apnea-hypopnea index (AHI) obtained from manual analysis of the polysomnography (PSG), which is the gold standard for sleep apnea diagnosis. The investigators will also compare the total sleep time (TST) derived by both systems. This study will be performed in a sleep lab environment.

Read the detailed description

The objective of this study is to evaluate the performance of a miniaturized sleep apnea test, called NightOwl. The system consists of a sensor placed on the fingertip and a cloud-based analytics software. The sensor acquires accelerometer and photoplethysmographic data. The software derives actigraphy from the former, and blood oxygen saturation and peripheral arterial tone (PAT), among other features, from the latter. In order to assess NightOwl's performance, The investigators will compare the respiratory event index (REI), defined as the number of respiratory events per hour of sleep, derived by the NightOwl system, to the AHI obtained from manual analysis of the polysomnography (PSG), which is the gold standard for sleep apnea diagnosis. The investigators will also compare the total sleep time (TST) derived by both systems. This study will be performed in a sleep lab environment.

As of March 2017, the new clinical practice guideline for diagnostic testing for adult sleep apnea of the American Academy of Sleep Medicine (AASM) for the first time formulates a strong recommendation that both polysomnography (PSG) and home sleep apnea testing (HSAT) are appropriate diagnostic testing options for uncomplicated adult patients who are at increased risk of moderate to severe sleep apnea.

Collop et al. performed a comprehensive analysis of the evidence for HSAT devices to diagnose obstructive sleep apnea (OSA) in out-of-center settings. The authors concluded that testing devices that analyze changes in peripheral arterial tone (PAT) in combination with actigraphy and blood oxygen saturation (SpO2) are adequate to diagnose OSA in patient populations with a high pre-test probability.

In this study, the investigators wish to assess the performance of a system for the diagnosis of OSA that measures and analyzes the abovementioned parameters, called NightOwl. The system consists of a small sensor device which is placed on the fingertip and a cloud-based analytics platform.

It is designed to be self-applied and initiated by the patient by attaching the sensor to the fingertip by means of an adhesive patch.

03

Conditions studied

  • Sleep Apnea
04

Who can participate

Ages eligible
13 Years and older
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Subjects with an indication for an in-lab polysomnography

Exclusion criteria

Exclusion Criteria:

  • Intellectually disabled people
  • People younger than 13 years of age.
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
106 participants (actual)

Study arms

  • Other
    PSG and NightOwl

    Default patient recruitment During the study, for each execution day, all patients that have been scheduled for a PSG will be presented with an informed consent. All recruited patients shall be a part of the study during which they wear the NightOwl Sensor while undergoing the PSG exam.

    Device: NightOwl

Interventions

  • DeviceNightOwl

    The NightOwl is a finger-mounted home sleep apnea testing device

06

What researchers measure

Primary outcomes

  1. Pearson Correlation Between the AHI

    The evaluation of the Pearson correlation between the apnea-hypopnea index (AHI) estimate obtained from the NightOwl and the AHI determined from the polysomnography (PSG); The AHI is defined as the number of apnea or hypopnea divided by the (estimated) total sleep time expressed in hours.

    Time frame: Through study completion, an average of 1 month.

  2. Pearson Correlation Between the TST

    The evaluation of the Pearson correlation between the total sleep time (TST) estimate obtained from the NightOwl and the TST determined from the PSG;

    Time frame: Through study completion, an average of 1 month.

  3. The Evaluation of the Level of Agreement (Classification Accuracy) Between Patient Categorization

    The evaluation of the level agreement (classification accuracy) between patient categorization (into sleep apnea severity categories) obtained by the NightOwl and those obtained by the PSG. This measure is calculated by dividing the number of participants on which both NightOwl and the PSG agree on the sleep apnea severity category by the total number of participants.

    Time frame: Through study completion, an average of 1 month.

07

Results

Posted Mar 10, 2021

Participant flow

Participant flow — Overall Study
MilestonePSG and NightOwl
Started106
Completed106
Not completed0

Outcome measures

PrimaryPearson Correlation Between the AHI

The evaluation of the Pearson correlation between the apnea-hypopnea index (AHI) estimate obtained from the NightOwl and the AHI determined from the polysomnography (PSG); The AHI is defined as the number of apnea or hypopnea divided by the (estimated) total sleep time expressed in hours.

Time frame:
Through study completion, an average of 1 month.
Reported as:
Number · Correlation coefficient
Pearson Correlation Between the AHI
Correlation coefficientPSG and NightOwl
Pearson Correlation Between the AHI0.909
PrimaryPearson Correlation Between the TST

The evaluation of the Pearson correlation between the total sleep time (TST) estimate obtained from the NightOwl and the TST determined from the PSG;

Time frame:
Through study completion, an average of 1 month.
Reported as:
Number · Correlation coefficient
Pearson Correlation Between the TST
Correlation coefficientPSG and NightOwl
Pearson Correlation Between the TST0.610
PrimaryThe Evaluation of the Level of Agreement (Classification Accuracy) Between Patient Categorization

The evaluation of the level agreement (classification accuracy) between patient categorization (into sleep apnea severity categories) obtained by the NightOwl and those obtained by the PSG. This measure is calculated by dividing the number of participants on which both NightOwl and the PSG agree on the sleep apnea severity category by the total number of participants.

Time frame:
Through study completion, an average of 1 month.
Reported as:
Number · Ratio
The Evaluation of the Level of Agreement (Classification Accuracy) Between Patient Categorization
RatioPSG and NightOwl
The Evaluation of the Level of Agreement (Classification Accuracy) Between Patient Categorization0.685

Adverse events

Collected over Through study completion (during the participant's single-night sleep study). Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
PSG and NightOwl0/106 (0%)0/106 (0%)0/106 (0%)

Baseline characteristics

Only participants for which technically adequate polysomnography and home sleep apnea test data was acquired were retained for Baseline Analysis

Age, Continuous
Age, Continuous(years)PSG and NightOwl
Mean59 ± 15.3
Sex: Female, Male
Sex: Female, Male(Participants)PSG and NightOwl
Female42
Male30
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)PSG and NightOwl
Hispanic or Latino39
Not Hispanic or Latino33
Unknown or Not Reported1
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)PSG and NightOwl
Race — Black18
Race — White54
Race — Not reported1
Region of Enrollment
Region of Enrollment(participants)PSG and NightOwl
United States73
BMI
BMI(kg/m^2)PSG and NightOwl
Mean32.6 ± 8.2
08

Study locations

3 sites
  • Miami Lakes Laboratory
    Miami Lakes, Florida 33016, United States
  • Plantation Laboratory East
    Plantation, Florida 33324, United States
  • Plantation Laboratory West
    Plantation, Florida 33324, United States
09

References and documents

Publications

  • Van Pee B, Massie F, Vits S, Dreesen P, Klerkx S, Bijwadia J, Verbraecken J, Bergmann J. A multicentric validation study of a novel home sleep apnea test based on peripheral arterial tonometry. Sleep. 2022 May 12;45(5):zsac028. doi: 10.1093/sleep/zsac028. Epub 2022 Feb 2. PubMed 35554589 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Dec 2019 to primary completion in Feb 2020, 1 month.

Results were first posted in Mar 2021, 1 year 1 month after primary completion.

Of 68 industry-sponsored interventional studies with no phase under Sleep Apnea Syndromes, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 18. This study's 1 month is below that.

Counting every sponsor, half of 268 studies reached it within 26 months; a quarter within 11 and three quarters within 56.

How these figures are worked out, and which studies are left out of them.

Registered
Nov 19, 2019
First posted
Dec 10, 2019
StartActual
Dec 2, 2019
Primary completionActual
Feb 1, 2020
CompletionActual
Feb 1, 2020
Results first posted
Mar 10, 2021
Last update
Mar 30, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 30, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04191668
Lead sponsor
Ectosense NV
Responsible party
Sponsor
First posted
Dec 10, 2019
Start date
Dec 2, 2019
Primary completion
Feb 1, 2020
Completion
Feb 1, 2020
Results posted
Mar 10, 2021
Last update
Mar 30, 2021

Study contacts

Frederik Massie, MSc
study director · Ectosense NV

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Mar 2021. You cannot join it, but the record below documents what was studied.

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