Clinically relevant monitoring of long‐term night‐time behaviour and physiology from the homes of people living with dementia.

Disturbances of sleep and night‐time behaviours are amongst the most disabling symptoms of dementia. They often increase carers’ burden and the risk of institutionalization. The causes are complex and are difficult to investigate because of a lack of acceptable methods for monitoring behaviours in the home. Here we show that a passive under‐mattress can be used to track changes in night‐time behaviour and physiology, and that a range of digital biomarkers produced are informative in understanding the effects of medication changes, disease progression and intercurrent illness in patients living with dementia (PLWD).