Observational StudyA Study Evaluating the Impact of P-tau217 Blood Biomarker Testing on Early Evaluation and Management of Patients Presenting With Cognitive Complaint

Inclusion Criteria:

Health Care Provider (HCP) Definitions

• Primary care physician (PCPs): physicians such as family medicine practitioners and internists who do not specialize in neurological care.
• Secondary care physicians (SCPs): physicians such as geriatricians or neurologists who see patients for specific reasons.
• Tertiary care physicians (TCPs): specialty neurologists who focus on certain neurological conditions.

HCP Participant Selection Criteria

• HCP inclusion criterion for each category of HCP is as follows:

• Group 1: PCPs who routinely evaluate and manage patients over the age of 50 in a family practice or internist setting.
• Group 2: SCPs and TCPs with experience diagnosing and treating patients with cognitive impairment and dementia.

Additional inclusion criteria applying to HCPs in the interventional group:

• Must be willing to review educational materials provided by the study sponsor, before enrolling patients.

Patient Participant Criteria

• Participants in the interventional group are eligible to be included in the study only if all the following criteria apply:

• Are capable of giving, and have given, signed informed consent.
• Have venous access sufficient to allow the protocol-required blood sampling.
• Are reliable, willing, and able to make themselves available for the duration of the study and are willing to follow study procedures.

Disease-specific Characteristics

• Present to the HCP with 1 or more subjective cognitive impairment complaints (SCIC) in the 4 weeks prior to identification: for example, worsening of memory, misplacing items, difficulty concentrating, or new challenges with problem solving.

Patient Participant Exclusion Criteria:

• In the 18 months prior to identification have prior or associated HCP-ordered referral or prior prescription of drug therapies, for the SCIC
• Participants with previous amyloid- or tau-specific tests, defined as

• Amyloid position emission tomography (PET)
• Tau PET
• Cerebral spinal fluid (CSF) tests for amyloid beta (Aβ) and/or tau biomarkers, or
• Blood tests for Aβ and/or tau biomarkers
• Has a current serious or unstable illness that in the enrolling investigator's opinion could interfere with completion of the study or have a life expectancy of less than 1 year.
• Has a known brain lesion, pathology, or prior alternative diagnosis that could explain the participant's clinical presentation.