Figure 1.

Figure 1. From: Changes in the Prevalence of Cognitive Impairment Among Older Americans, 1993-2004: Overall Trends and Differences by Race/Ethnicity.

Unadjusted and adjusted trends in the probability of cognitive impairment among older Americans in the US Health and Retirement Study, 1993–2004. Estimates are from successive logistic regression models with a year trend variable: unadjusted (diamonds; P < 0.001); age-adjusted (squares; P < 0.001); adjusted for age and prior exposure to the cognitive test (triangles; P = 0.012); and adjusted for age, prior exposure to the cognitive test, and educational level (x's; P = 0.546). When plotting results, we substituted 78 years for age, 0.75 for prior testing (i.e. retesting for 75% of sample), and 11 years for educational level.

Kristin M. Sheffield, et al. Am J Epidemiol. 2011 August 1;174(3):274-283.

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