Table 2

Descriptive statistics for cognitive tests by APOE genotype

*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


Christensen et al. BMC Geriatrics 2008 8:14   doi:10.1186/1471-2318-8-14

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