Table 1 Exams and corresponding variables

Physical evaluation

Body Mass Index

BMI

Weight/height²

Neck circumference

NC

Largest diameter of the neck (mm)

Mallampati classification

Mallampati

Classification of oropharynx soft tissue hypertrophy

Mandibular Sagittal Position

MSP

Distance from Gnation to Nasion, 3 categories (retrusive, normotrusive, protrusive)

Overjet

Overjet

Sagittal distance from the upper and lower incisors’ incisal borders (mm)

Questionnaires

Epworth Sleepiness Scale

ESS

Tool to assess daytime somnolence

Quebec Sleep Questionnaire

QSQ

Tool to assess OSA-related quality of life (average of all domains)

QSQ I

“Sleepiness” domain

QSQ II

“Diurnal symptons” domain

QSQ III

“Nocturnal symptons” domain

QSQ IV

“Emotions” domain

QSQ V

“Social interactions” domain

Home sleep test

Total sleep time

TST

Estimated total time of sleep

Apnea/hypopnea index

AHI

Count of respiratory events per hour of sleep

Improvement index

AHI < 50%

Number of participants with an AHI 50% reduction after the intervention

Improvement index II

AHI < 5

Number of participants with a post-intervention AHI of 5 or less

Flow limitation index

FLOW

Percentage of sleep time with an important flattening of the breathing waves

Blood O₂ saturation index

SpO₂

Mean fraction of saturated hemoglobin and total hemoglobin (%)

SpO₂min

Minimal fraction of saturated hemoglobin and total hemoglobin (%)

Snoring

SNRdb

Intensity of oropharyngeal reverberation (db)

SNR%

Time spent snoring versus total sleep time (min)

Body Position

BPsup

Time spent on supine position versus total sleep time (min)

Bruxism index

BRUX

Bruxism episodes per hour of sleep (#/h)

BRUXap

Bruxism episodes related to apneic events per hour of sleep (#/h)

Cone-beam tomography

Intersutural gap

IG

Average of 3 measurements along the palate on an axial slice