Table 6. Search strategy.

Database	Search Terms
PubMed	Intensive care units[mh] OR critical care[mh] OR critical illness[mh] OR "ICU"[tiab] OR intensive care unit*[tiab] OR "intensive care"[tiab] OR "critical care"[tiab] OR "critical illness"[tiab] OR "critically ill"[tiab] AND Patients[mh] OR Family[mh] OR patient*[tiab] OR "family"[tiab] OR "families"[tiab] OR family member*[tiab] OR relative*[tiab] AND quality of death*[tiab] OR quality of dying*[tiab] OR good death*[tiab] OR bad death*[tiab] OR "QODD"[tiab] OR "GDI"[tiab] OR "CES"[tiab] NOT animals [mh] NOT humans [mh]
CINAHL via EBSCOhost	(MH Intensive care units) OR (MH critical care) OR (MH critical illness) OR ("ICU") OR (intensive care unit*) OR ("intensive care") OR ("critical care") OR ("critical illness") OR ("critically ill") AND (MH Patients) OR (MH Family) OR (patient*) OR ("family") OR ("families") OR (family member*) OR (relative*) AND (quality of death*) OR (quality of dying*) OR (good death*) OR (bad death*) OR ("QODD") OR ("GDI") OR ("CES") NOT (MH animals) NOT (MH humans)
PsycINFO	(MJ Intensive care) OR (MJ Critical Illness) OR (TI intensive care unit*) OR (TI "intensive care") OR (TI "ICU") OR (TI "critical care") OR (TI "critical illness") OR (TI "critically ill") OR (AB intensive care unit*) OR (AB "intensive care") OR (AB "ICU") OR (AB "critical care") OR (AB "critical illness") OR (AB "critically ill") AND (MJ Patients) OR (MJ Family) OR (TI patient*) OR (TI "family") OR (TI "families") OR (TI family member*) OR (TI relative*) OR (AB patient*) OR (AB "family") OR (AB "families") OR (AB family member*) OR (AB relative*) AND (TI quality of death*) OR (TI quality of dying*) OR (TI good death*) OR (TI bad death*) OR (TI "QODD") OR (TI "GDI") OR (TI "CES") OR (AB quality of death*) OR (AB quality of dying*) OR (AB good death*) OR (AB bad death*) OR (AB "QODD") OR (AB "GDI") OR (AB "CES")
Igaku Chuo Zasshi	ICU/TH OR critical care/TH OR critically ill/TH OR ICU/TA OR intensive care unit/TA OR intensive care/TA OR critical care/TA OR critically ill/TA OR serious illness/TA OR critical illness/TA AND Patients/TH OR Family/TH OR patient/TA OR family/TA OR family member/TA OR relative/TA OR significant other/TA OR key person/TA AND quality of death/TA OR good death/TA OR "QODD"/TA OR "GDI"/TA OR "Care Evaluation Scale"/TA NOT animals/TH NOT humans/TH