Table 1 Search strategy according to different databases

PubMed

#1 (((((((((((((((aged [MeSH Terms]) OR aged [Title/Abstract]) OR elderly [Title/Abstract]) OR ((Aged, 80 and over [MeSH Terms]))) OR ((“Aged, 80[Title/Abstract] AND over”[Title/Abstract]))) OR “oldest old”[Title/Abstract]) OR Nonagenarian*[Title/Abstract]) OR Octogenarian*[Title/Abstract]) OR Centenarian*[Title/Abstract]) OR “Old people”[Title/Abstract]) OR “Old person”) OR “Elders”) OR “Elderly people”) OR “Elderly person”) OR “Elderly population”) OR Seniors [Title/Abstract]

#2 (((((((((((((((((((((((Institutionalization [MeSH Terms]) OR Institutionalized Person*[Title/Abstract]) OR “Person, Institutionalized”[Title/Abstract]) OR Institutionalization*[Title/Abstract]) OR Homes for the Aged [MeSH Terms]) OR “Home, Old Age”[Title/Abstract]) OR “Homes, Old Age”[Title/Abstract]) OR Old Age Home*[Title/Abstract]) OR “Geriatric Long-Term Care Facilities”[Title/Abstract]) OR “Geriatric Long-Term Care Institutions”[Title/Abstract]) OR “Homes for the Aged”[Title/Abstract]) OR Almshouses [MeSH Terms]) OR Almshouse*[Title/Abstract]) OR Poorhouse*[Title/Abstract]) OR Nursing Homes [MeSH Terms]) OR “Homes, Nursing”[Title/Abstract]) OR “Home, Nursing”[Title/Abstract]) OR Nursing Home*[Title/Abstract]) OR Housing for the elderly [MeSH Terms]) OR “Life Care Centers, Retirement”[Title/Abstract]) OR “Continuing Care Retirement Centers”[Title/Abstract]) OR “Housing for the elderly”[Title/Abstract]) OR “Institutionalized older adults”[Title/Abstract]) OR “Institutionalized elderly”[Title/Abstract]

#3 (((((((((((((((Independent living [MeSH Terms]) OR “Living, Independent”[Title/Abstract]) OR “Community Dwelling”[Title/Abstract]) OR “Dwelling, Community”[Title/Abstract]) OR “Dwellings, Community”[Title/Abstract]) OR “Aging in Place”[Title/Abstract]) OR “Independent living”[Title/Abstract]) OR Deinstitutionalization [MeSH Terms]) OR “Deinstitutionalized Persons”[Title/Abstract]) OR “Deinstitutionalized Person”[Title/Abstract]) OR “Persons, Deinstitutionalized”[Title/Abstract]) OR Deinstitutionalization [Title/Abstract]) OR “Non-institutionalized elderly”[Title/Abstract]) OR “Non-institutionalized elders”[Title/Abstract]) OR Non-institutional [Title/Abstract]) OR Community [Title/Abstract]

#4 ((((Quality of Life [MeSH Terms]) OR “Life Quality”[Title/Abstract]) OR “Health Related Quality Of Life”[Title/Abstract]) OR HRQOL [Title/Abstract]) OR “Quality of life”[Title/Abstract]

#1 AND #2 AND #3 AND #4

Scopus

#1 TITLE-ABS-KEY (aged) OR TITLE-ABS-KEY (elderly) OR TITLE-ABS-KEY(“Oldest Old”) OR TITLE-ABS-KEY (Nonagenarian*) OR TITLE-ABS-KEY (Octogenarian*) OR TITLE-ABS-KEY (Centenarian*) OR TITLE-ABS-KEY(“aged, 80 over”) OR TITLE-ABS-KEY(“Old people”) OR TITLE-ABS-KEY(“old person”) OR TITLE-ABS-KEY (elders) OR TITLE-ABS-KEY(“elderly people”) OR TITLE-ABS-KEY(“elderly person”) OR TITLE-ABS-KEY(“elderly population”) OR TITLE-ABS-KEY (seniors)

#2 TITLE-ABS-KEY (Institutionalized AND Person*) OR TITLE-ABS-KEY(“Person, Institutionalized”) OR TITLE-ABS-KEY (Institutionalization*) OR TITLE-ABS-KEY(“Home, Old Age”) OR TITLE-ABS-KEY(“Homes, Old Age”) OR TITLE-ABS-KEY (Old AND Age AND Home*) OR TITLE-ABS-KEY(“Geriatric Long-Term Care Facilities”) OR TITLE-ABS-KEY(“Geriatric Long-Term Care Institutions”) OR TITLE-ABS-KEY(“Homes for the Aged”) OR TITLE-ABS-KEY (Almshouse*) OR TITLE-ABS-KEY (Poorhouse*) OR TITLE-ABS-KEY (Nursing AND Home*) OR TITLE-ABS-KEY(“Home, Nursing”) OR TITLE-ABS-KEY(“Homes, Nursing”) OR TITLE-ABS-KEY(“Housing for the elderly”) OR TITLE-ABS-KEY(“Life Care Centers, Retirement”) OR TITLE-ABS-KEY(“Continuing Care Retirement Centers”) OR TITLE-ABS-KEY(“Institutionalized older adults”) OR TITLE-ABS-KEY(“Institutionalized elderly”)

#3 TITLE-ABS-KEY(“Independent living”) OR TITLE-ABS-KEY(“Community Dwelling”) OR TITLE-ABS-KEY(“Dwelling, Community”) OR TITLE-ABS-KEY(“Dwellings, Community”) OR TITLE-ABS-KEY(“Aging in Place”) OR TITLE-ABS-KEY (Deinstitutionalization) OR TITLE-ABS-KEY(“Deinstitutionalized Persons”) OR TITLE-ABS-KEY(“Deinstitutionalized Person”) OR TITLE-ABS-KEY(“Persons, Deinstitutionalized”) OR TITLE-ABS-KEY(“Independent living”) OR TITLE-ABS-KEY(“Non-institutionalized elderly”) OR TITLE-ABS-KEY(“Non-institutionalized elders”) OR TITLE-ABS-KEY (non-institutional) OR TITLE-ABS-KEY (community)

#4 TITLE-ABS-KEY(“Quality of Life”) OR TITLE-ABS-KEY(“Life Quality”) OR TITLE-ABS-KEY(“Health Related Quality of Life”) OR TITLE-ABS-KEY (HRQOL)

#1 AND #2 AND #3 AND #4

Web of Science

#1 TS = (aged OR elderly OR “Oldest Old” OR Nonagenarian* OR Octogenarian* OR Centenarian* OR “Aged, 80 and over” OR “Old people” OR “old person” OR elders OR “elderly people” OR “elderly person” OR “elderly population” OR seniors)

#2 TS = (Institutionalized Person* OR “Person, Institutionalized” OR Institutionalization OR Institutionalization* OR “Home, Old Age” OR “Homes, Old Age” OR Old Age Home* OR “Geriatric Long-Term Care Facilities” OR “Geriatric Long-Term Care Institutions” OR “Homes for the Aged” OR “Homes for the Aged” OR Almshouses OR Almshouse* OR Poorhouse* OR “Nursing Homes” OR Nursing Home* OR “Home, Nursing” OR “Homes, Nursing” OR “Housing for the elderly” OR “Life Care Centers, Retirement” OR “Continuing Care Retirement Centers” OR “Institutionalized older adults” OR “Institutionalized elderly”)

#3 TS = (“Independent living” OR “Living, Independent” OR “Community Dwelling” OR “Dwelling, Community” OR “Dwellings, Community” OR “Aging in Place” OR Deinstitutionalization OR “Deinstitutionalized Persons” OR “Deinstitutionalized Person” OR “Persons, Deinstitutionalized” OR Deinstitutionalization OR “Independent living” OR “Non-institutionalized elderly” OR “Non-institutionalized elders” OR “non-institutional” OR community)

#4 TS = (“Quality of Life” OR “Life Quality” OR “Health Related Quality Of Life” OR HRQOL)

#1 AND #2 AND #3 AND #4

Cochrane Library

#1 MeSH descriptor: [Aged] explode all trees 1640

#2 aged OR elderly OR “Oldest Old” OR Nonagenarian* OR Octogenarian* OR Centenarian* 430,102

#3 MeSH descriptor: [Aged, 80 and over] explode all trees 262

#4 “Aged, 80 and over” OR “Old people” OR “old person” OR elders OR “elderly people” OR “elderly person” OR “elderly population” OR seniors 52,836

#5 #1 OR #2 OR #3 OR #4 430,609

#6 MeSH descriptor: [Institutionalization] explode all trees 200

#7 Institutionalization* OR Institutionalized Person* OR “Person, Institutionalized” 794

#8 MeSH descriptor: [Homes for the Aged] explode all trees 556

#9 “Homes for the Aged” OR “Home, Old Age” OR “Homes, Old Age”OR Old Age Home* OR “Geriatric Long-Term Care Facilities”OR “Geriatric Long-Term Care Institutions” 0

#10 MeSH descriptor: [Almshouses] explode all trees 0

#11 Almshouse* OR Poorhouse* 2

#12 MeSH descriptor: [Nursing Homes] explode all trees 1189

#13 Nursing Home* OR “Home, Nursing” OR “Homes, Nursing” 6599

#14 MeSH descriptor: [Housing for the Elderly] explode all trees 35

#15 “Housing for the elderly” OR “Care Centers, Retirement” OR “Continuing Care Retirement Centers” OR “Institutionalized older adults” OR “Institutionalized elderly” 352

#16 #6 OR #7 OR #8 OR #9 OR #10 OR #11 OR #12 OR #13 OR #14 OR #15 1,302,402

#17 MeSH descriptor: [Independent Living] explode all trees 267

#18 “Independent living” OR “Living, Independent” OR “Community Dwelling” OR “Dwelling, Community” OR “Dwellings, Community” OR “Aging in Place” 3417

#19 MeSH descriptor: [Deinstitutionalization] explode all trees 22

#20 Deinstitutionalization OR “Deinstitutionalized Persons” OR “Deinstitutionalized Person” OR “Persons, Deinstitutionalized” OR “Non-institutionalized elderly” OR “Non-institutionalized elders” OR “non-institutional” OR community 37,791

#21 MeSH descriptor: [Quality of Life] explode all trees 20,225

#22 “Quality of Life” OR “Life Quality” OR “Health Related Quality Of Life” OR HRQOL 72,184

#23 #17 OR #18 OR #19 OR #20 38,098

#24 #21 OR #22 72,184

#25 #5 AND #16 AND #23 AND #24 3450

Lilacs

#1 (mh:(aged)) OR (tw:(aged)) OR (tw:(elderly)) OR (tw:(“Oldest Old”)) OR (tw:(Nonagenarian$)) OR (tw:(Octogenarian$)) OR (tw:(Centenarian$)) OR (mh:(“Aged, 80 and over”)) OR (tw:(“Aged, 80 and over”)) OR (tw:(“Old people”)) OR (tw:(“old person”)) OR (tw:(elders)) OR (tw:(“elderly people”)) OR (tw:(“elderly person”)) OR (tw:(“elderly population”)) OR (tw:(seniors))

#2 (tw:(Institutionalized Person$)) OR (tw:(“Person, Institutionalized”)) OR (mh:(“Institutionalization”)) OR (tw:(Institutionalization$)) OR (tw:(“Home, Old Age”)) OR (tw:(“Homes, Old Age”)) OR (tw:(Old Age Home$)) OR (tw:(“Geriatric Long-Term Care Facilities”)) OR (tw:(“Geriatric Long-Term Care Institutions”)) OR (tw:(“Homes for the Aged”)) OR (tw:(“Homes for the Aged”)) OR (mh:(“Almshouses”)) OR (tw:(Almshouse$)) OR (tw:(Poorhouse$)) OR (mh:(“Nursing Homes”)) OR (tw:(Nursing Home$)) OR (tw:(“Home, Nursing”)) OR (tw:(“Homes, Nursing”)) OR (mh:(“Housing for the elderly”)) OR (tw:(“Housing for the elderly”)) OR (tw:(“Life Care Centers, Retirement”)) OR (tw:(“Continuing Care Retirement Centers”)) OR (tw:(“Institutionalized older adults”)) OR (tw:(“Institutionalized elderly”))

#3 (mh:(Independent living)) OR (tw:(“Independent living”)) OR (tw:(“Living, Independent”)) OR (tw:(“Community Dwelling”)) OR (tw:(“Dwelling, Community”)) OR (tw:(“Dwellings, Community”)) OR (tw:(“Aging in Place”)) OR (mh:(Deinstitutionalization)) OR (tw:(Deinstitutionalization)) OR (tw:(“Deinstitutionalized Persons”)) OR (tw:(“Deinstitutionalized Person”)) OR (tw:(“Persons, Deinstitutionalized”)) OR (mh:(Deinstitutionalization)) OR (tw:(Deinstitutionalization)) OR (mh:(“Non-institutionalized elderly”)) OR (tw:(“Non-institutionalized elders”)) OR (tw:(“non-institutional”)) OR (tw:(community))

#4 (mh:(“Quality of Life”)) OR (tw:(“Quality of Life”)) OR (tw:(“Life Quality”)) OR (tw:(“Health Related Quality Of Life”)) OR (tw:(HRQOL))

#1 AND #2 AND #3 AND #4

Open Grey

#1 (aged OR elderly OR “Oldest Old” OR Nonagenarian* OR Octogenarian* OR Centenarian* OR “Aged, 80 and over” OR “Old people” OR “old person” OR elders OR “elderly people” OR “elderly person” OR “elderly population” OR seniors)

#2 (Institutionalized Person* OR “Person, Institutionalized” OR Institutionalization OR Institutionalization* OR “Home, Old Age” OR “Homes, Old Age” OR Old Age Home* OR “Geriatric Long-Term Care Facilities” OR “Geriatric Long-Term Care Institutions” OR “Homes for the Aged” OR “Homes for the Aged” OR Almshouses OR Almshouse* OR Poorhouse* OR “Nursing Homes” OR Nursing Home* OR “Home, Nursing” OR “Homes, Nursing” OR “Housing for the elderly” OR “Life Care Centers, Retirement” OR “Continuing Care Retirement Centers” OR “Institutionalized older adults” OR “Institutionalized elderly”)

#3 (“Independent living” OR “Living, Independent” OR “Community Dwelling” OR “Dwelling, Community” OR “Dwellings, Community” OR “Aging in Place” OR Deinstitutionalization OR “Deinstitutionalized Persons” OR “Deinstitutionalized Person” OR “Persons, Deinstitutionalized” OR Deinstitutionalization OR “Independent living” OR “Non-institutionalized elderly” OR “Non-institutionalized elders” OR “non-institutional” OR community)

#4 (“Quality of Life” OR “Life Quality” OR “Health Related Quality Of Life” OR HRQOL)

#1 AND #2 AND #3 AND #4