34 Chapter 2 Figure 2. Kaplan Meier curves illustrating clinical progression in subjective cognitive decline Kaplan-Meier curves illustrate clinical progression to dementia (A) and to mild cognitive impairment or dementia (B). Separate lines represent the 8 ATN biomarker profiles. The numbers at risk for time points 0, 1, 2, 3, 4, and 5 years are depicted below the figure.