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RecruitingNCT06247631Updated Jan 30, 2025

STOP-Bang Questionnaire: a Predictor of Obstructive Sleep Apnea and Difficult Mask/intubation?

An observational study in Difficult Intubation and Airway Disease, sponsored by Atatürk Chest Diseases and Chest Surgery Training and Research Hospital. Recruiting at 1 site in Turkey. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2025-01-30.

Sponsored by Atatürk Chest Diseases and Chest Surgery Training and Research Hospital · Observational

From the registry’s dates

  • Primary completion was expected by Dec 2025, 11 months ago, but the record still lists the study as recruiting.
  • Started Jan 2024; still recruiting 2 years 10 months later.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
125
Ages
18 Years to 65 Years
Sex
All
01

Where this study stands

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

Among 54 studies in Sleep Apnea, Obstructive with a site in Turkey — 17 open to participants now, 17 under way, 2 of them phase 3. Sleep Apnea, Obstructive · Turkey.

Planned enrollment
14th of 34
125 · median 79
Started
2024
with 3 others
Observational
34 of 54
11 open now
Primary completion
2025-12
later than 3 of 16 live
Registered
33rd of 54
by date
Lead sponsor
2 of 54
Atatürk Chest Diseases and Chest Surgery Training and Research Hospital

Among the 54 studies in Sleep Apnea, Obstructive with a site in Turkey, this one is the 14th largest by planned enrollment of the 34 observational ones, is one of 4 that started in 2024, is one of 34 observational ones, reaches primary completion later than 3 of the 16 other live ones, and was the 33rd registered.

By phase

54 studies; the count open now beside each. This study's row is marked.

Observationalthis study34 · 11 open
No phase16 · 4 open
Phase 32 · 2 open
Phase 42 · 0 open

By the year they started

First in 2006; this study’s year is marked. 4 started in 2024.

Size and results

Median enrollment 45 across the 20 interventional studies, 79 across the 34 observational. Of the 31 that completed or were terminated, 0 (0%) have results posted.

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Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 54 studies in Sleep Apnea, Obstructive with a site in Turkey, or all of them as a file.
02

Study summary

Difficult airway management remains the leading cause of anaesthesia-related morbidity and mortality. Obstructive sleep apnea syndrome (OSAS) is a warning sign of difficult airway management. Polysomnography is the gold standard for diagnosis of this syndrome, but the STOP-BANG questionnaire is the preferred screening test. In this study, we wanted to find an answer to the question How successful is the STOP-BANG questionnaire in screening for obstructive sleep apnea syndrome (OSAS) in predicting OSAS, difficult mask and difficult intubation in patients undergoing thoracic surgery?

03

Conditions studied

  • Difficult Intubation
  • Airway Disease

Keywords

  • difficult intubation
  • difficult mask
  • Obstructive Sleep Apnea Syndrome
  • STOP-BANG
  • thoracic surgery
04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients between the ages of 18-65, ASA 1-3, who will undergo thoracic surgery at the Ankara Atatürk Sanatorium Training and Research Hospital of the University of Health Sciences will be included in the study.

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

  • Patient undergoing thoracic surgery
  • 18-65 years old
  • ASA 1-3

Exclusion criteria

Exclusion Criteria:

  • Having a history of obstructive sleep apnea syndrome,
  • Having a history of previous head and neck surgery/radiotherapy,
  • Patients who did not agree to participate in the study
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
125 participants (estimated)
Patient registry
No

Groups and cohorts

  • Control

    Easy airway: unassisted mask ventilation, ventilation without the need for an airway, achieving oxygen saturation above 90% during mask ventilation, and unassisted intubation with less than three attempts.

    Other: STOP BANG

  • Difficult airway

    Difficult airway: assisted mask ventilation, need for airway during ventilation, oxygen saturation falling below 90% during mask ventilation, assisted intubation, intubation attempt three and above

    Other: STOP BANG

Interventions

  • OtherSTOP BANG

    The STOP-Bang Questionnaire is intended to give physicians an easy-to-use tool to identify people who might have obstructive sleep apnea (OSA). The questionnaire consists of eight yes-or-no questions based on the major risk factors for OSA. A STOP-Bang score of 2 or less is considered low risk, and a score of 5 or more is high risk for having either moderate or severe OSA. For people who score 3 or 4, doctors may need to perform further assessment to determine how likely they are to have OSA.

    Also known as: STOP-Bang Questionnaire

06

What researchers measure

Primary outcomes

  1. STOP-BANG questionnaire

    A STOP-Bang score of 2 or less is considered low risk, and a score of 5 or more is high risk for having either moderate or severe obstructive sleep apnea (OSA). For people who score 3 or 4, doctors may need to perform further assessment to determine how likely they are to have OSA.

    Time frame: 1 month (1 time)

07

Study locations

1 of 1 sites recruiting
08

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

Started Jan 2024 (actual). Primary completion is estimated for Dec 2025, 23 months after the start.

Of 258 non-industry observational studies under Sleep Apnea, Obstructive, half reached primary completion within 31 months of starting (the median), counting those still running; a quarter within 16 and three quarters within 61. This study's planned 23 months is below that.

Counting every sponsor, half of 294 studies reached it within 28 months; a quarter within 14 and three quarters within 63.

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

Registered
Jan 22, 2024
First posted
Feb 8, 2024
StartActual
Jan 10, 2024
Primary completionEst.
Dec 10, 2025
CompletionEst.
Jul 10, 2026
Last update
Jan 30, 2025
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 Jan 30, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT06247631
Lead sponsor
Atatürk Chest Diseases and Chest Surgery Training and Research Hospital
Responsible party
Ali Alagoz (Department of anesthesiology and reanimation, Principal Investigator, Specialist Doctor, Atatürk Chest Diseases and Chest Surgery Training and Research Hospital) — Principal investigator
First posted
Feb 8, 2024
Start date
Jan 10, 2024
Primary completion
Dec 10, 2025 (estimated)
Completion
Jul 10, 2026 (estimated)
Last update
Jan 30, 2025

Study contacts

Ali ALAGÖZ, professor
Contact
mdalagoz@gmail.com
5079193765 ext. +9
Ali ALAGÖZ, professor
principal investigator · Ankara Ataturk Sanatorium Training and Research Hospital

Oversight

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

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