Table 4 Questionnaires distributed to the staff and the leading ward registered nurse based on the RE-AIM-framework ^a for the evaluation of complex interventions

Proportion of staff members participating in education and training sessions

A registration form to assess participation of staff in education and training sessions

Reach: proportion of staff in INH that actually participated in the intervention during the trial

At the start of the intervention during education sessions

All staff members in intervention nursing homes (INH)

Individual participation of staff members in effectuating the components of the model

Self-developed questionnaire

Reach: as above Maintenance: extent to which the model is sustained over time

6 and 12 months after the start of the intervention

All staff members in INH

Attitudes towards persons with dementia, mastery, social interaction, job satisfaction and self-assessment of competence with neuropsychiatric symptoms (NPS)

Approaches to the Dementia Questionnaire ^b, QPS-Nordic ^c and a self-developed questionnaire for assessment of competence with NPS

Efficacy: outcomes regarding knowledge, skills and/or attitudes of the staff in NH

1 month before, and 6 and 12 months after the start of the intervention

All staff members in control nursing homes (CNH) and in INH

Clinical routines in place in NH, i.e., questions assessing daily routines of practice for assessment and treatment of NPS

Self-developed questionnaire based on evidence-informed best practice for assessment and treatment of NPS

Adoption: proportion of wards that will adopt the intervention Maintenance: extent to which the model is sustained over time

1 month before and 6 and 12 months after the start of the intervention

Leading ward registered nurse in INH and CNH

Fidelity to the main components in the model

Interview of TIME administrators by telephone using a checklist based on the components in the TIME manual

Implementation: extent to which the intervention is actually implemented

3 brief interviews, the first one 3 weeks after the start of the intervention and then at 1-month intervals

TIME administrators in INH

Organizational structure in the nursing homes: size of wards, type of unit, number of staff, etc.

Self-developed questionnaire

Implementation: possibility to assess and analyse implementation barriers and facilitators

At the start of the intervention

Leading ward registered nurse in INH and CNH