Objective: To examine the cross-sectional relationship between physical performance and dementia in the oldest old (those ≥ 90 years of age).
Design: Cross-sectional study.
Setting: The 90+ Study is a population-based, longitudinal, epidemiologic study of aging and dementia performed at the University of California, Irvine, from January 1, 2003, through November 30, 2009.