Tab. III.

Search concepts and keywords used combined with appropriate Boolean operators.

Database	Population (critical care nurses)	Setting (critical care settings)	Outcome (well-being or burnout)	Timing (Covid pandemic)
PubMed	AND (“nurse s”[All Fields] OR “nurses”[MeSH Terms] OR “nurses”[All Fields] OR “nurse”[All Fields] OR “nurses s”[All Fields] OR (“nurse s”[All Fields] OR “nurses”[MeSH Terms] OR “nurses”[All Fields] OR “nurse”[All Fields] OR “nurses s”[All Fields]) OR (“nursing staff”[MeSH Terms] OR (“nursing”[All Fields] AND “staff”[All Fields]) OR “nursing staff”[All Fields]) OR (“nursing staff”[MeSH Terms] OR (“nursing”[All Fields] AND “staff”[All Fields]) OR “nursing staff”[All Fields] OR (“nursing”[All Fields] AND “personnel”[All Fields]) OR “nursing personnel”[All Fields] OR “nurses”[MeSH Terms] OR “nurses”[All Fields] OR (“nursing”[All Fields] AND “personnel”[All Fields])) OR (“crit care nurse”[Journal] OR (“critical”[All Fields] AND “care”[All Fields] AND “nurse”[All Fields]) OR “critical care nurse”[All Fields]) OR ((“emerge”[All Fields] OR “emerged”[All Fields] OR “emergence”[All Fields] OR “emergences”[All Fields] OR “emergencies”[MeSH Terms] OR “emergencies”[All Fields] OR “emergency”[All Fields] OR “emergent”[All Fields] OR “emergently”[All Fields] OR “emergents”[All Fields] OR “emerges”[All Fields] OR “emerging”[All Fields]) AND (“nurse s”[All Fields] OR “nurses”[MeSH Terms] OR “nurses”[All Fields] OR “nurse”[All Fields] OR “nurses s”[All Fields]))))	(“critical care”[MeSH Terms] OR (“critical”[All Fields] AND “care”[All Fields]) OR “critical care”[All Fields] OR (“critical care”[MeSH Terms] OR (“critical”[All Fields] AND “care”[All Fields]) OR “critical care”[All Fields] OR (“intensive”[All Fields] AND “care”[All Fields]) OR “intensive care”[All Fields]) OR (“intensive care units”[MeSH Terms] OR (“intensive”[All Fields] AND “care”[All Fields] AND “units”[All Fields]) OR “intensive care units”[All Fields]) OR (“emerge”[All Fields] OR “emerged”[All Fields] OR “emergence”[All Fields] OR “emergences”[All Fields] OR “emergencies”[MeSH Terms] OR “emergencies”[All Fields] OR “emergency”[All Fields] OR “emergent”[All Fields] OR “emergently”[All Fields] OR “emergents”[All Fields] OR “emerges”[All Fields] OR “emerging”[All Fields]) OR (“emergency medical services”[MeSH Terms] OR (“emergency”[All Fields] AND “medical”[All Fields] AND “services”[All Fields]) OR “emergency medical services”[All Fields]) OR (“emergency service, hospital”[MeSH Terms] OR (“emergency”[All Fields] AND “service”[All Fields] AND “hospital”[All Fields]) OR “hospital emergency service”[All Fields] OR (“emergency”[All Fields] AND “service”[All Fields] AND “hospital”[All Fields]) OR “emergency service hospital”[All Fields]) OR (“trauma centers”[MeSH Terms] OR (“trauma”[All Fields] AND “centers”[All Fields]) OR “trauma centers”[All Fields]) OR (“triage”[MeSH Terms] OR “triage”[All Fields] OR “triages”[All Fields] OR “triaged”[All Fields] OR “triaging”[All Fields]) OR (“emergency service, hospital”[MeSH Terms] OR (“emergency”[All Fields] AND “service”[All Fields] AND “hospital”[All Fields]) OR “hospital emergency service”[All Fields] OR (“emergency”[All Fields] AND “department”[All Fields]) OR “emergency department”[All Fields]) OR (“intensive care units”[MeSH Terms] OR (“intensive”[All Fields] AND “care”[All Fields] AND “units”[All Fields]) OR “intensive care units”[All Fields] OR “icu”[All Fields]) OR “ICUs”[All Fields] OR ((“intensive”[All Fields] OR “intensives”[All Fields]) AND (“therapeutics”[MeSH Terms] OR “therapeutics”[All Fields] OR “therapies”[All Fields] OR “therapy”[MeSH Subheading] OR “therapy”[All Fields] OR “therapy s”[All Fields] OR “therapys”[All Fields])) OR (“emergency service, hospital”[MeSH Terms] OR (“emergency”[All Fields] AND “service”[All Fields] AND “hospital”[All Fields]) OR “hospital emergency service”[All Fields] OR (“emergency”[All Fields] AND “room”[All Fields]) OR “emergency room”[All Fields]) OR “ER”[All Fields]))	((“wellbeing”[All Fields] OR (“health”[MeSH Terms] OR “health”[All Fields] OR “well”[All Fields] OR “well being”[All Fields]) OR (“burnout s”[All Fields] OR “burnout, psychological”[MeSH Terms] OR (“burnout”[All Fields] AND “psychological”[All Fields]) OR “psychological burnout”[All Fields] OR “burnout”[All Fields] OR “burnouts”[All Fields]))	(“sars cov 2”[MeSH Terms] OR “sars cov 2”[All Fields] OR “covid”[All Fields] OR “covid 19”[MeSH Terms] OR “covid 19”[All Fields] OR (“covid 19”[All Fields] OR “covid 19”[MeSH Terms] OR “covid 19 vaccines”[All Fields] OR “covid 19 vaccines”[MeSH Terms] OR “covid 19 serotherapy”[All Fields] OR “covid 19 nucleic acid testing”[All Fields] OR “covid 19 nucleic acid testing”[MeSH Terms] OR “covid 19 serological testing”[All Fields] OR “covid 19 serological testing”[MeSH Terms] OR “covid 19 testing”[All Fields] OR “covid 19 testing”[MeSH Terms] OR “sars cov 2”[All Fields] OR “sars cov 2”[MeSH Terms] OR “severe acute respiratory syndrome coronavirus 2”[All Fields] OR “ncov”[All Fields] OR “2019 ncov”[All Fields] OR ((“coronavirus”[MeSH Terms] OR “coronavirus”[All Fields] OR “cov”[All Fields]) AND 2019/11/01:3000/12/31[Date - Publication])) OR “Sars-Cov2”[All Fields] OR (“pandemia”[All Fields] OR “pandemias”[All Fields]) OR ((“pandemic s”[All Fields] OR “pandemically”[All Fields] OR “pandemicity”[All Fields] OR “pandemics”[MeSH Terms] OR “pandemics”[All Fields] OR “pandemic”[All Fields])))
Scopus	(nurse OR nurses OR “nursing staff” OR “nursing personnel” OR “critical care nurse” OR “emergency nurses”)	(“critical care” OR “intensive care” OR “intensive care units” OR emergency OR “Emergency Medical Services” OR “Emergency Service Hospital” OR “Trauma centers” OR triage OR “Emergency Department” OR icu OR icus OR “intensive therapy” OR “Emergency room” OR ER)	(wellbeing OR well-being OR burnout)	(covid OR covid-19 OR sars-cov2 OR pandemic)
CINAHL	(nurse OR nurses OR “nursing staff” OR “nursing personnel” OR “critical care nurse” OR “emergency nurses”)	(“critical care” OR “intensive care” OR “intensive care units” OR emergency OR “Emergency Medical Services” OR “Emergency Service Hospital” OR “Trauma centers” OR triage OR “Emergency Department” OR icu OR icus OR “intensive therapy” OR “Emergency room” OR ER)	(wellbeing OR well-being OR burnout)	(covid OR covid-19 OR sars-cov2 OR pandemic)
Cochrane	(nurse OR nurses OR nursing staff OR nursing personnel OR critical care nurse OR emergency nurses) in All Text	(critical care OR intensive care OR intensive care units OR emergency OR Emergency Medical Services OR Emergency Service Hospital OR Trauma centers OR Triage OR Emergency Department OR ICU OR ICUs OR intensive therapy OR Emergency room OR ER) in All Text	(wellbeing OR well-being OR burnout) in All Text	(Covid OR Covid-19 OR Sars-Cov2 OR pandemia OR pandemic) in All Text
Web on Science	(nurse OR nurses OR nursing staff OR nursing personnel OR critical care nurse OR emergency nurses)	(critical care OR intensive care OR intensive care units OR emergency OR Emergency Medical Services OR Emergency Service Hospital OR Trauma centers OR Triage OR Emergency Department OR ICU OR ICUs OR intensive therapy OR Emergency room OR ER)	(wellbeing OR well-being OR burnout)	(Covid OR Covid-19 OR Sars-Cov2 OR pandemia OR pandemic)
PsycINFO	(nurse OR nurses OR nursing staff OR nursing personnel OR critical care nurse OR emergency nurses)	(critical care OR intensive care OR intensive care units OR emergency OR Emergency Medical Services OR Emergency Service Hospital OR Trauma centers OR Triage OR Emergency Department OR ICU OR ICUs OR intensive therapy OR Emergency room OR ER)	(wellbeing OR well-being OR burnout)	(Covid OR Covid-19 OR Sars-Cov2 OR pandemia OR pandemic)