. 2022 Jul 31;13(5):1057–1069. doi: 10.1007/s41999-022-00667-9

Table 5.

Search strings used for each database

Database	Search
Scopus	ALL ( ( "frail" OR "multimorbid" OR "highly comorbid") AND ( "elderly" OR "older" OR "old") AND ( "acs" OR "acute coronary" OR "myocardial infarction" OR "unstable angina" OR "stemi" OR "nstemi" OR "nsteacs" OR "nste-acs" OR "ua") AND ( "pci" OR "percutaneous coronary intervention" OR "angiogra" OR "invasive management" OR "invasive strategy" OR "medical management" OR "conservative strategy" OR "conservative management" OR "cabg" OR "coronary artery bypass" OR "thromboly") AND ( "causa" OR "treatment effect" OR "treatment benefit" OR "treatment outcomes" OR "versus" OR "vs" OR "compar")) AND PUBYEAR > 1989 AND ( LIMIT-TO ( DOCTYPE, "ar") OR LIMIT-TO ( DOCTYPE, "cp")) AND ( LIMIT-TO ( LANGUAGE, "English"))
Embase	("frail" or "multimorbid" or "highly comorbid").af ("elderly" or "older" or "old").af ("acs" or "acute coronary" or "myocardial infarction" or "unstable angina" or "stemi" or "nstemi" or "nsteacs" or "nste-acs" or "ua").af ("pci" or "percutaneous coronary intervention" or "angiogra" or "invasive management" or "invasive strategy" or "medical management" or "conservative strategy" or "conservative management" or "cabg" or "coronary artery bypass" or "thromboly").af ("causa" or "treatment effect" or "treatment benefit" or "treatment outcomes" or "versus" or "vs" or "compar").af 1 and 2 and 3 and 4 and 5 limit 6 to (english language and yr = "1990 -Current")
PubMed	((((frail OR multimorbid OR (highly comorbid)) AND (elderly OR older OR old)) AND (acs OR acute coronary OR (myocardial infarction) OR (unstable angina) OR stemi OR nstemi OR nsteacs OR nste-acs OR ua)) AND (pci OR (percutaneous coronary intervention) OR angiogra* OR (invasive management) OR (invasive strategy) OR (medical management) or (conservative strategy) OR (conservative management) OR cabg OR (coronary artery bypass) OR thromboly)) AND (causa OR (treatment effect) OR (treatment benefit) OR (treatment outcomes) OR versus OR vs OR compar*) Filters: English, from 1990/1/1 to 2022/5/07

Database

Scopus

ALL ( ( "frail" OR "multimorbid" OR "highly comorbid") AND ( "elderly" OR "older" OR "old") AND ( "acs" OR "acute coronary" OR "myocardial infarction" OR "unstable angina" OR "stemi" OR "nstemi" OR "nsteacs" OR "nste-acs" OR "ua") AND ( "pci" OR "percutaneous coronary intervention" OR "angiogra*" OR "invasive management" OR "invasive strategy" OR "medical management" OR "conservative strategy" OR "conservative management" OR "cabg" OR "coronary artery bypass" OR "thromboly*") AND ( "causa*" OR "treatment effect" OR "treatment benefit" OR "treatment outcomes" OR "versus" OR "vs" OR "compar*")) AND PUBYEAR > 1989 AND ( LIMIT-TO ( DOCTYPE, "ar") OR LIMIT-TO ( DOCTYPE, "cp")) AND ( LIMIT-TO ( LANGUAGE, "English"))

Embase

("frail" or "multimorbid" or "highly comorbid").af

("elderly" or "older" or "old").af

("acs" or "acute coronary" or "myocardial infarction" or "unstable angina" or "stemi" or "nstemi" or "nsteacs" or "nste-acs" or "ua").af

("pci" or "percutaneous coronary intervention" or "angiogra*" or "invasive management" or "invasive strategy" or "medical management" or "conservative strategy" or "conservative management" or "cabg" or "coronary artery bypass" or "thromboly*").af

("causa*" or "treatment effect" or "treatment benefit" or "treatment outcomes" or "versus" or "vs" or "compar*").af

1 and 2 and 3 and 4 and 5

limit 6 to (english language and yr = "1990 -Current")

PubMed

((((frail OR multimorbid OR (highly comorbid)) AND (elderly OR older OR old)) AND (acs OR acute coronary OR (myocardial infarction) OR (unstable angina) OR stemi OR nstemi OR nsteacs OR nste-acs OR ua)) AND (pci OR (percutaneous coronary intervention) OR angiogra* OR (invasive management) OR (invasive strategy) OR (medical management) or (conservative strategy) OR (conservative management) OR cabg OR (coronary artery bypass) OR thromboly*)) AND (causa* OR (treatment effect) OR (treatment benefit) OR (treatment outcomes) OR versus OR vs OR compar*) Filters: English, from 1990/1/1 to 2022/5/07