Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Jul 6;8(8):1646–1655. doi: 10.1002/acn3.51414

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2021 The Authors. Annals of Clinical and Translational Neurology published by Wiley Periodicals LLC on behalf of American Neurological Association

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

PMC Copyright notice

Screening timeline for the A4 Study. Screening required 4 to 5 visits depending on whether the participant completed an optional lumbar puncture (LP). Education, informed consent, and psychological and pre‐disclosure assessments were completed at screening visit 1. Amyloid results were disclosed at visit 3. The Views and Perceptions of Amyloid Imaging questionnaire was completed at screening visits 1 and 3. CSSRS indicates Columbia Suicide Severity Rating Scale; FTP, future time perspective; GDS, Geriatric Depression Scale; IES, Impact of Events Scale; MRI, magnetic resonance imaging; PET, positron emission tomography; STAI, State‐Trait Anxiety Scale; V, visit.