Traditionally, the more severity of dementia patients, the heavier the burden of the comparators, and in the clinical observation,the dementia patients with rich mental behavior symptoms are more burdened. Therefore, exploring the impact of psychological burden and different subtypes of different dimensions with Behavioral and psychological symptoms (BPSD) will more comprehensive understanding of the factors affecting the burden of caregivers.

The starting point of this project is to analyze the relationship between the types of mental behavior symptoms of dementia patients and the emotional disorders of caregivers. The topic will analyze the correlation of psychological burden of caregivers and different symptom dimensions from the perspective of refinement, helping more effective identifying high-burden mental behavior symptoms in clinically , judging the risk of emotional problems in caregivers, and adopting better humanities or medical care, so that dementia patients can better adapt to care and improve the mental health of caregivers.

Inclusion Criteria:

1. Age is greater than 18 years old, gender is not limited
2. Comply with ICD-10 diagnostic criteria, diagnosed with dementia, including Alzheimer's disease, vascular dementia, frontotemporal dementia, dementia with Lewy body, dementia caused by Parkinson's disease

Exclusion Criteria:

1. senile schizophrenia;
2. senile depression;
3. cognitive impairment caused by endocrine system diseases (such as decreased thyroid and adrenal function);
4. Cognitive impairment or dementia caused by serious diseases such as cardiovascular, lung, liver, kidney, and hematopoietic system;
5. Cognitive impairment or dementia caused by alcohol, drug use, psychotropic drugs; 6）Other physical or chemical factors that cause cognitive impairment or dementia-

Outpatients and community dementia patients and their primary caregivers