Table 1

Search strategy for PubMed, EMBase, Cochrane Library, ISI Knowledge via Web of Science and MedRxiv or BioRxiv databases

DatabaseSearch items
PubMed
No.
# 1((frail) OR (frailed)) OR (frailty)
# 2(COVID-19) OR (SARS-CoV-2)
# 3# 1 and # 2
EMBase
# 1frail OR (frailed) OR frailty
# 2‘COVID-19 19’ OR ‘sars cov 2’
# 3# 1 and # 2
Cochrane Library
# 1frail in All Text OR frailed in All Text OR frailty in All Text
# 2COVID-19 in All Text OR SARS-CoV-2 in All Text
# 3# 1 and # 2
ISI Knowledge via Web of Science
# 1TOPIC: (frail) OR TOPIC: (frailed) OR TOPIC: (frailty)
Timespan: All years. Databases: WOS, BIOSIS, KJD, MEDLINE, RSCI, SCIELO.
Search language=Auto
# 2TOPIC: (COVID-19) OR TOPIC: (SARS-CoV-2)
Timespan: All years. Databases: WOS, BIOSIS, KJD, MEDLINE, RSCI, SCIELO.
Search language=Auto
# 3# 1 and # 2
MedRxiv or BioRxiv
# 1((frail) OR (frailed)) OR (frailty)
# 2(COVID-19) OR (SARS-CoV-2)
# 3# 1 and # 2