Table 1.

Measurement instruments

Residents
Variable	Instrument/source	Type of variable
Demographic variables	Single items	Control variables
Qol	Quality of Life-Alzheimer’s Disease (Qol-AD)	Primary outcome
Qol	QUALIDEM	Secondary outcome
Neuropsychiatric symptoms	Neuropsychiatric Inventory – Nursing Homes (NPI-NH)	Secondary outcome
Dependency	Physical Self-Maintenance Scale (PSMS)	Control variables
Dementia severity	Functional Assessment Staging (FAST)	Control variable
Medication	Medication documentation sheets	Control variable
Staff
Variable	Instrument/source	Type of variable
Demographic variables	Single items	Control variables
Perception of dementia	Attitudes to Dementia Questionnaire (ADQ)	Primary outcome
Job satisfaction	Copenhagen Psychosocial Questionnaire (COPSOQ) (4 Item Scale)	Secondary outcome
Burnout	Copenhagen Burnout Inventory (CBI)	Secondary outcome
Dementia-specific burden	BelaDem Questionnaire	Control variables
Implementation process
Domain	Instrument/source	Type of variable
Intervention characteristics outer setting, inner setting, characteristics of individuals process of implementation	Interviews with head nurses and staff members	Influencing factor
Characteristics of individuals	single items of staff questionnaire	Influencing factor
Inner setting	DIQ questionnaire	Influencing factor
Inner setting	SYMLOG	Influencing factor
Process of implementation	Process documents (for example, posters, protocols, mail)	Influencing factor
Fidelity of implementation	Interviews with head nurses and staff members; single items of staff questionnaire; process documents (posters, protocols, action plans)	Degree of implementation
Successful implementation of PCC	Resident records	Degree of implementation
Environmental changes	Dementia Milieu Assessment (DMA)	Degree of implementation
Cost effectiveness
Domain	Instrument/source	Type of variable
Resource use	Nursing home administration system	Cost outcome