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Table 2 Descriptive statistics for cognitive tests by APOE genotype

From: The association of APOE genotype and cognitive decline in interaction with risk factors in a 65–69 year old community sample

    *E4-/*E4- *E4+/*E4- *E4+/*E4+  
    (n = 1473) (n = 510) (n = 38)  
   n Mean (SD) Mean (SD) Mean (SD) p
Wave 2 SDMT   1984 49.55 (9.34) 49.71 (8.92) 48.00 (10.93) 0.547
Wave 2 immediate recall   1984 6.97 (2.22) 7.00 (2.09) 6.79 (2.74) 0.850
Wave 2 delayed recall   1984 6.18 (2.40) 6.12 (2.32) 5.89 (2.81) 0.704
Wave 2 digits backwards   1964 5.13 (2.21) 5.21 (2.22) 5.05 (1.80) 0.772
Wave 2 MMSE score   1974 29.24 (1.17) 29.25 (1.12) 28.71 (1.49) 0.021
Wave 2 simple RT (sec)   1925 0.28 (0.07) 0.28 (0.08) 0.26 (0.05) 0.659
Wave 2 choice RT (sec)   1919 0.33 (0.06) 0.33 (0.05) 0.32 (0.04) 0.902
Change in SDMT   1980 -0.99 (5.73) -1.07 (5.60) -1.63 (7.44) 0.781
Change in immediate recall   1984 -0.32 (2.07) -0.29 (2.06) -0.32 (2.49) 0.959
Change in delayed recall   1984 -0.17 (2.20) -0.22 (2.25) -0.21 (3.03) 0.907
Change in digits backwards   1962 0.09 (1.77) 0.30 (1.82) 0.27 (1.76) 0.075
Change in MMSE score   1971 -0.07 (1.16) 0.00 (1.17) -0.27 (1.43) 0.274
Change in simple RT (sec)   1897 0.03 (0.06) 0.03 (0.07) 0.02 (0.05) 0.892
Change in choice RT (sec)   1880 0.01 (0.04) 0.01 (0.04) 0.01 (0.04) 0.838