ACCI	Age-adjusted Charlson Comorbidity Index
ARDS	Acute respiratory distress syndrome
CFS	Clinical Frailty Scale
COVID-19	Coronavirus disease 2019
DLCO	Diffusing lung capacity for carbon monoxide
FAD-GF6	Family Assessment Device
FEV1	Forced expiratory volume in 1 s
FEV1/FVC	Forced expiratory ratio
COFICS	COVID-19 Follow-up Intensive Care Studies
FVC	Forced vital capacity
HADS	Hospital Anxiety and Depression Scale
ICU	Intensive Care Unit
MERS	Middle East Respiratory Syndrome
QoL	Quality of Life domains
SARS	Severe acute respiratory syndrome
SF-20	Short-Form General Health Survey
TLC	Total lung capacity