Protocol registered in PROSPERO International prospective register of systematic reviews. The main aim and our guiding question for our critical interpretive synthesis (CIS) review is to explore what is the evidence base for dementia training in hospitals?

Our objective is to gain further understanding about:

[a] What are the effects of training at:
i. staff level? (e.g., knowledge, confidence, strain, satisfaction in interacting with dementia patients, prescribing behaviour, medicine management);
ii. patient and carer level? (e.g., patient experience (reports and ratings of care), including carers experiences, and quality of life, QALYs, adverse events, opportunity costs, clinical outcomes/measures of effectiveness, health status, utility values)
iii. organisational level? (e.g., length of hospital stay, elective and non-elective length of stay, emergency readmissions and length of stay, guidelines and resources, cost implication and cost-effectiveness).

[b] How are these effects moderated by context, staff groups and policies? What are the mechanisms, barriers and facilitators of dementia-related training in a hospital setting?