25(OH)D	25-hydroxy-vitamin D
AHI	Apnea-Hypopnea Index
ALT	Alanine Aminotransferase
AST	Aspartate Aminotransferase
Aver SaO2	Average Oxyhaemoglobin Saturation
BMI	Body Mass Index
CRP	C-Reactive Protein
ESS	Epworth Sleepiness Scale
FEV1	Forced Expiratory Volume in 1st sec
FVC	Forced Vital Capacity
HDL-C	High-Density Lipoprotein Cholesterol
LDL-C	Low-Density Lipoprotein Cholesterol
Min SaO2	Minimum Oxyhaemoglobin Saturation
N1	Sleep Stage 1
N2	Sleep Stage 2
N3	Sleep Stage 3
OSAS	Obstructive Sleep Apnea Syndrome
pCO2	Carbon dioxide Partial Pressure
pO2	Oxygen Partial Pressure
PSG	Polysomnography
REM	Rapid Eye Movement
T < 90%	Time with Oxyhaemoglobin Saturation <90%
TST	Total Sleep Time