The goal of this randomized clinical trial is to compare the efficacy of the use of a diary to record behavioral and psychological symptoms of dementia (BPSD) in persons with dementia. The main questions it aims to answer are:

• Does the use of a diary lead to a reduction of the caregiver's burden at 3 months, compared with standard care?
• Does the use of a diary lead to a reduction of the neuropsychiatric inventory (NPI) score at 3 months, compared with standard care?
• Does the use of a diary result in less psychotropic drugs prescribed to the patient at 3 months compared with standard care?
• Are physicians and caregivers satisfied with managing patients with the use of a diary?
• Does the use of a diary reduce the caregiver's stress related to BPSD at 3 months, compared with standard care? Participants will be randomly assigned to either the use of a diary or a control group. Caregivers in the diary arm will be asked to fill in a diary with BPSD including triggers, severity, day and hour, to be analyzed by physicians to prescribe appropriate pharmacological or non-pharmacological interventions. The control group will receive usual care (i.e., appropriate interventions will be applied after interviewing the caregiver and/or visiting the patient).

Inclusion Criteria:

• Diagnosis of cognitive impairment (neurodegenerative or vascular)
• Caregiver and patient willing to participate in the study
• Caregiver living with the patient or able to cover all 24 hours
• Presence of BPSD pertaining to the hyperactivity-irritability-impulsivity-disinhibition cluster (HIDA)
• Signed informed consent before the beginning of the study

Exclusion Criteria:

• Refusal to consent to participate in the study