Accepted for Publication: April 19, 2012.
Published Online: September 3, 2012. doi:10.1001/archneurol.2012.1527
Author Contributions:Study concept and design: Brickman, Blum, Stern, and Luchsinger. Acquisition of data: Provenzano, Manly, Stern, Brown, Luchsinger, and Mayeux. Analysis and interpretation of data: Brickman, Provenzano, Muraskin, Blum, Apa, and Luchsinger. Drafting of the manuscript: Brickman, Provenzano, Muraskin, Brown, Luchsinger, and Mayeux. Critical revision of the manuscript for important intellectual content: Brickman, Provenzano, Muraskin, Manly, Blum, Apa, Stern, and Mayeux. Statistical analysis: Brickman and Muraskin. Obtained funding: Brickman, Manly, Stern, Luchsinger, and Mayeux. Administrative, technical, and material support: Manly, Brown, and Mayeux. Study supervision: Brickman.
Financial Disclosure: None reported.
Funding/Support: This study was sponsored by grants AG037212, AG007232, AG029949, and AG034189 from the National Institutes of Health.
Additional Contributions: We are grateful to Charles DeCarli, MD, for providing measurements of hippocampal and intracranial volumes.