. Author manuscript; available in PMC: 2013 Dec 1.

Published in final edited form as: Brain Imaging Behav. 2012 Dec;6(4):517–527. doi: 10.1007/s11682-012-9176-1

Table 3.

Standardized time ratios (TR), with 95 % confidence intervals (CI), for predicting conversion to dementia, controlling for age, education, gender and any APOE-ε4 alleles. Ratios greater than one indicate a longer survival time

EF score	Baseline TR (95 % CI)	Previous Visit TR (95 % CI)
ADNI-EF	1.30 (1.16, 1.45)	1.36 (1.22, 1.50)
Category Fluency	1.13 (1.01, 1.26)	1.27 (1.14, 1.41)
Clock Drawing	1.18 (1.09, 1.29)	1.21 (1.11, 1.32)
WAIS-R Digit Symbol	1.26 (1.14, 1.40)	1.26 (1.15, 1.39)
Digit Span Backwards	1.02 (0.92, 1.12)	1.05 (0.95, 1.15)
Trails A^a	1.16 (1.06, 1.28)	1.14 (1.05, 1.24)
Trails B^a	1.20 (1.09, 1.32)	1.29 (1.18, 1.41)
Trails B–Trails A^a	1.17 (1.06, 1.29)	1.28 (1.17, 1.39)

Trails scores were reversed so higher scores are better for all outcomes.