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. Author manuscript; available in PMC: 2010 Aug 16.
Published in final edited form as: J Int Neuropsychol Soc. 2010 Apr 7;16(4):651–660. doi: 10.1017/S1355617710000421

Fig. 2.

Fig. 2

Kaplan-Meier survival curve depicting time to conversion to a consensus diagnosis of Alzheimer's disease (AD), broken down by the three Neuropsychological Assessment Battery (NAB) List Learning algorithm-defined groups (control, mild cognitive impairment [MCI], and AD). Lines represent data uncorrected for age and education. Lines marked with the same letter (“a” or “b”) do not differ significantly in hazards ratio after correcting for age and education in the Cox proportional hazards model. Vertical hash marks represent censored data.