Can an app help people with dementia sleep better? small study tests digital CBT

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Age ≥50 years. 2. Sleep Condition Indicator Score ≤16/32. 3. Established Mild Cognitive Impairment (MCI) or mild dementia, diagnosed by a consultant physician specialised in cognitive disorders prior to enrolment in the study. Dementia will be defined using DSM-5 classification and staged according to the Reisberg FAST scale into early/mild stage (Stages 1-4). MCI will be defined using Petersen's criteria. To participate those with MCI/mild dementia must score: 1. ≥18 on the Mini-Mental State Examination (MMSE), and 2. ≥0.5-1.0 on the Clinical Dementia Rating (CDR) scale. 4. Internet access for the duration of the intervention (via computer/tablet/smartphone). 5. Sufficient physical/sensory (visual/hearing) capacity to use the intervention, as judged by the clinician/investigator. 6. English-speaker (intervention only available in English). 7. Community-dwellers (non-institutionalised). Exclusion Criteria: 1. Known history of an International Classification of Diseases (ICD) defined sleep disorder other than insomnia disorder. 2. Receipt of a sleep-related cognitive behavioural therapy (CBT) intervention within the past six months. 3. MMSE score \<18 at enrolment, to facilitate adherence and ensure recruitment of those with mild-stage disease. 4. Severe depression (defined as depression requiring hospitalisation in the past 12-months or visit to psychiatry outpatient clinic in the past 3 months). 5. Unstable depression/anxiety disorders or panic attacks (unstable will be defined as changes in antidepressant medications within the last 3 months, i.e. no start, stop or change in dose). 6. Other relevant major neuropsychiatric disorders, including schizophrenia, psychosis, mania, bipolar affective disorder, epilepsy or seizure disorder. 7. Ongoing substance or alcohol abuse. 8. Long-term physical or sensory impairment, pain or other medical condition which, in the opinion of the principal investigator, could impair participation for reasons other than cognitive impairment. 9. Planned surgery or hospitalisation during the study that could interfere with participation. 10. Medical conditions rendering the patient too unwell to continue to participate in the study in the opinion of the principal investigator. 11. A change in the following medication within the three months prior to enrolment: 1. Benzodiazepine and non-benzodiazepine hypnotic or anxiolytics agents 2. Cholinesterase inhibitors or Memantine 3. Antidepressants 4. Antipsychotics 5. Amphetamine derivatives 6. Decongestants (pseudoephedrine, phenylephrine, phenyl¬propanolamine) 7. Narcotic analgesics 8. β-Blockers 9. Pulmonary medications (theophylline and albuterol) 10. Melatonin