PUBLIC LIBRARY / SCORE

STOP-Bang

Screens moderate-to-severe obstructive sleep apnea with eight yes/no questions, chiefly in preanesthetic assessment.

Calculate with transparency

Check the population, units and version. The result shows the formula or classification; it does not make an automatic treatment decision.

Preparing the form…

Check the method
Enter the data
Check the result

Method · Limits of application

STOP-Bang/Chung 2008:8 binary variables 0–8; Chung 2016 stratification

Screening for obstructive sleep apnea risk, originally studied in preoperative adults without a previous diagnosis. A risk result does not confirm apnea. Use in another population requires specific evidence; this review has established neither reproduction authorization nor clinical approval.

Conditions of use

Check the population, units, inclusion and exclusion criteria, and version in the original source. A result alone does not establish a diagnosis, discharge decision or prescription.

Documented parameters

Snoring: do you snore loudly (loud enough to be heard through a closed door)?
Tired: do you often feel tired or sleepy during the day?
Observed: has anyone observed pauses in your breathing during sleep?
Pressure: do you have or receive treatment for high blood pressure?
BMI: body mass index above 35 kg/m²
Age: older than 50 years
Neck: neck circumference above 40 cm
Gender: male sex

3/3 reference cases checked. Numerical tests are not clinical validation.

Sources and documentation

Documented formula

Transcribed from the source or a recorded revision; this is not a clinical recommendation.

One point per “yes” (0 to 8).

References

Identifier: stop-bang

Original clinical content: Brazilian Portuguese.

Method version

STOP-Bang/Chung 2008:8 binary variables 0–8; Chung 2016 stratification

stop-bang@native-2026-10-03+f10148914e6b

Source for the active edition

The bibliographic edition identifies the source. By itself, it proves neither full conformity of the formula nor clinical approval.

Synthetic cases checked (3)

Synthetic cases for checking the implementation, with no patient data.

Case 1

reference-001

Inputs

Snoring: do you snore loudly (loud enough to be heard through a closed door)?: Yes
Tired: do you often feel tired or sleepy during the day?: Yes
Observed: has anyone observed pauses in your breathing during sleep?: No
Pressure: do you have or receive treatment for high blood pressure?: No
BMI: body mass index above 35 kg/m²: No
Age: older than 50 years: No
Neck: neck circumference above 40 cm: No
Gender: male sex: No

{
  "s": true,
  "t": true,
  "o": false,
  "p": false,
  "b": false,
  "a": false,
  "n": false,
  "g": false
}

Expected result

{
  "score": 2,
  "level": "low"
}

Actual result

{
  "score": 2
}

Case 2

reference-002

Inputs

Snoring: do you snore loudly (loud enough to be heard through a closed door)?: Yes
Pressure: do you have or receive treatment for high blood pressure?: Yes
Age: older than 50 years: Yes
Gender: male sex: Yes
Tired: do you often feel tired or sleepy during the day?: No
Observed: has anyone observed pauses in your breathing during sleep?: No
BMI: body mass index above 35 kg/m²: No
Neck: neck circumference above 40 cm: No

{
  "s": true,
  "p": true,
  "a": true,
  "g": true,
  "t": false,
  "o": false,
  "b": false,
  "n": false
}

Expected result

{
  "score": 4,
  "level": "mid"
}

Actual result

{
  "score": 4
}

Case 3

reference-003

Inputs

Snoring: do you snore loudly (loud enough to be heard through a closed door)?: Yes
Observed: has anyone observed pauses in your breathing during sleep?: Yes
BMI: body mass index above 35 kg/m²: Yes
Age: older than 50 years: Yes
Neck: neck circumference above 40 cm: Yes
Gender: male sex: Yes
Tired: do you often feel tired or sleepy during the day?: No
Pressure: do you have or receive treatment for high blood pressure?: No

{
  "s": true,
  "o": true,
  "b": true,
  "a": true,
  "n": true,
  "g": true,
  "t": false,
  "p": false
}

Expected result

{
  "score": 6,
  "level": "high"
}

Actual result

{
  "score": 6
}

Code and reproducibility

This tool’s code on GitHub

Download code and tests

Sources, version and reproduction instructions

The code tests are technical checks. Clinical approval and professional translation review are recorded separately.

Relationship with cancer research

General context — relationship to be defined

A resource for general clinical contexts. This edition does not assign a specific oncological relationship; selecting it for a study requires a justified question, population and purpose.