AHI	Apnea–Hypopnea Index
CRSwNP	Chronic Rhinosinusitis with Nasal Polyps
CRSsNP	Chronic Rhinosinusitis without Nasal Polyps
EPOS	European Position Paper on Rhinosinusitis
ESS	Epworth Sleepiness Scale
EUFOREA	European Forum for Research and Education in Allergy and Airways diseases
FDA	US Food and Drug Administration
FeNO	Fractional Exhaled Nitric Oxide
HRQoL	Health-Related Quality of Life
IgE	Immunoglobulin E
IL-4	Interleukin-4
IL-4Rα	Interleukin-4 receptor alpha
IL-5	Interleukin-5
IL-10	Interleukin-10
IL-13	Interleukin-13
INCS	Intranasal Corticosteroids
ISI	Insomnia Severity Index
MCID	Minimal Clinically Important Difference
MeSH	Medical Subject Headings
NOSE	Nasal Obstruction Symptom Evaluation
NPS	Nasal Polyp Score
NREM	Non-Rapid Eye Movement
OSA	Obstructive Sleep Apnea
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROMs	Patient-Reported Outcome Measures
PSQI	Pittsburgh Sleep Quality Index
QoL	Quality of Life
REM	Rapid Eye Movement
ROBINS-I	Risk of Bias in Non-randomized Studies of Interventions
RoB 2	Cochrane Risk of Bias tool for randomized trials
SDB	Sleep-Disordered Breathing
SNOT-22	Sinonasal Outcome Test-22
TNF	Tumor Necrosis Factor
TGF-β	Transforming Growth Factor beta
VAS	Visual Analogue Scale