Table 1 Characteristics of the study group showing means, standard deviation, and range of the total sample and dichotomized by group

N (n women)

230 (115)

140 (71)

90 (44)

Age (years)

65.2 ± 7.6

(50–80)

63 ± 6.9

(50–79)

68.6 ± 7.5

(50–80)

**

APOE4 carrier (%)

71 (30%)

(n = 228)

27 (19%)

44 (49%)

**

WML/TIV

0.17 ± 0.37

(0–2.8)

(n = 229)

0.11 ± 0.25

(0–1.5)

0.28 ± 0.48

(0–2.8)

**

 Education

15.8 ± 3.3

(6–29)

16 ± 3.1

(10–25)

15 ± 3.7

(6–29)

 MWT

31.9 ± 2.7

(21–37)

32.4 ± 2

(24–37)

31.1 ± 3

(21–37)

 Lifestyle index

16.2 ± 2.6

(7–22)

(n = 139)

16.3 ± 2.5

(7–20)

16.1 ± 2.7

(9–22)

 MMSE

28.7 ± 1.2

(24–30)

29.0 ± 1.1

(26–30)

28.3 ± 1.4

(24–30)

**

 G factor score

–

0.35 ± 0.8

(−1.6 to 1.8)

−0.55 ± 0.9

(−1.3 to 2.6)

**

 Executive function factor score

–

0.25 ± 0.6

(−1.2 to 2.7)

−0.39 ± 1.1

(−1.1 to 4.7)

**

 Memory factor score

–

0.33 ± 0.8

(−1.9 to 1.7)

−0.52 ± 0.9

(−2.5 to 1.3)

**