STANDARDIZED ARITHMETIC TESTSThe AD subgroups performed inferiorly to controls (P<.001) on both oral and written arithmetic tests (Table 1). Age and education level were not related to group effects for either test. Patients with moderate AD performed significantly worse than patients with mild AD on WRAT-3 Arithmetic (P<.002), but similarly on WAIS-III Arithmetic. The total number of problems attempted on the WRAT-3 Arithmetic subtest differed significantly between the AD subgroups and controls (P<.001). Patients with mild AD attempted a mean (SD) of 28.0 (1.3) problems, patients with moderate AD attempted 17.8 (1.4) problems, and controls attempted 32.8 (0.8) problems. The MMSE score correlated significantly with AD patient performance on WAIS-III Arithmetic (r = 0.42; P<.05), overall WRAT-3 Arithmetic (r = 0.56; P<.01), and the WRAT-3 problem subset (r = 0.48; P<.02).
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