Table 3.

Overview of studies that defined study participants with dementia based on a recorded diagnosis

Publications	Method of sample determination	Definition and diagnostic criteria used for (new) dementia diagnosis	Screenings performed	Qualification and training of professionals performing screenings/diagnostics
[41]	A suspected dementia diagnosis (by nursing staff) or existing dementia diagnosis confirmed by the attending GP	▪ ICD-10 criteria ▪ Dementia severity stages: MMSE: 0-9 severe, 10-17 moderate, ≥ 18 mild dementia	MMSE, GDS, NOSGER, E-ADL,	Not specified
[42]	Diagnostics not performed in the study, but the admission criteria for the living unit were used as inclusion criteria (dementia diagnosis, minimum of care level 2, behavioral problems according to the CMAI, and mobility)	▪ No information given on the diagnostic procedure of the existing diagnosis	DSS	Professional nursing staff, training of raters is not specified
[43]
[44]	Dementia diagnosis was derived from the interRAI LTCF assessment in the records	▪ No information given on the diagnostic procedure of the existing diagnosis	InterRAI (LTCF)	Not specified
[45]	Residents with a medical diagnosis of dementia were included.	▪ No information given on the diagnostic procedure of the existing diagnosis	GDS	Measures were assessed by nurses.
[46]	Residents with a medical diagnosis of dementia were included.	▪ Assessment of the dementia type according to the ICD-10 classification (as recorded) ▪ Assessment of dementia severity according to the German guideline for dementia and recommended MMSE cutoff values (0-9 severe, 10-19 moderate, 20-26 mild)	MMSE	Not specified.

DSS Dementia Screening Scale, E-ADL Erlangen Activities of Daily Living, GDS Global Deterioration Scale, interRAI LTCF international Resident Assessment Instrument Long Term Care Facility, MMSE Mini Mental State Examination, NOSGER Nurses’ Observation Scale