@Nicolò Zarott, I have not gone into the details. My idea is to collect the symptoms of the patients which are having problems due to dementia and initial help the doctors for early classification as those suffering from Dementia and those not suffering.
It sounds like you may want to go to the clinical standards and institutional protocols, but not research. I would recommend talking to your university to access UpToDate or institutional protocols, such as:
UpToDate:
Evaluation of cognitive impairment and dementia by Eric B Larson, MD, MPH
Clinical features and diagnosis of Alzheimer disease by David A Wolk, MDBradford C Dickerson, MD
etc.
To access ToToDate, you may need a subscription from your university library.
I hope you’re doing good. I’m currently working on validating observer-rated only scales to assess presence of depressive symptoms in moderately severe dementia (in the nursing field).
Throughout hundreds of articles I’ve read, I saw a lack of consensus on how to diagnose depression in dementia (e.g.: ICD-10 criteria, DSM, PDC-dAD, etc.). For the Alzheimer’s type dementia, some studies suggest the use of the Provisional Diagnostic Criteria for Depression of Alzheimer's Disease (PDC-dAD). A lot of studies use this criteria measure (PDC-dAD) as the reference standard for depression diagnosis in other types of dementia (ex: vascular, fronto-temporal, ect.), however the same limit always come back to surface: the PDC-dAD was developed for Alzheimer’s disease and never validated for any other types of dementia. This being said, there seems to be a need in developing a consensus for depression diagnosis in diverse dementia types/severity. It would be very interesting to either validate the PDC-dAD in different dementia types/severity or construct a new universal criteria measure for depression in all dementia types (or one who incorporates criteria for the different types). All studies I’ve seen on the assessment of depression in dementia discusses how the main difficulty for healthcare providers (physicians and nurses) is the bidirectional relationship between the two problems and how symptoms of depression in this clientele could actually be behavioral and psychological symptoms of dementia or vice versa, leading to over or under detection/diagnosis of depression.
I hope my answer is the type you are looking for and hope this helps! Have a nice day!