Introducing the '3 Fs model of complexity' for people with dementia accessing a NHS mental health inpatient dementia assessment ward: An interpretive description study.

The '3 Fs Model of Complexity' may facilitate a more holistic view of a person with dementia than when 'symptoms' are viewed in isolation. Going forward, and subject to further refinement and testing, the '3 Fs Model of Complexity' could help guide the selection of tailored, personalised interventions for people with dementia, including formulation approaches.