Table 1 Characteristics of the study population

Age, years (mean ± SD)

64.1 ± 10.4

64.3 ± 9.6

63.5 ± 9.4

0.822

Gender, No. (%)

0.091

Male

41 (53.2 %)

35 (54.7 %)

86 (55.8 %)

Female

36 (46.8 %)

29 (45.3 %)

68 (44.2 %)

BMI, kg/m2(mean ± SD)

23.8 ± 3.1

23.4 ± 3.2

23.4 ± 3.1

0.081

MMSE Score (mean ± SD)

28.0 ± 1.4

26.1 ± 1.8

14.9 ± 5.9

<0.017^a

MES Score (mean ± SD)

84.0 ± 6.2

63.4 ± 10.9

32.8 ± 18.9

<0.017^b

Education, years (mean ± SD)

10.1 ± 3.5

9.4 ± 3.5

8.9 ± 4.2

0.094

fT3, pmol/L (mean ± SD)

4.4 ± 0.5

4.5 ± 0.6

4.6 ± 0.5

0.032^c

fT4, pmol/L (mean ± SD)

15.2 ± 2.2

15.0 ± 1.8

14.8 ± 2.1

0.295

TSH, mU/L (mean ± SD)

2.0 ± 1.0

2.0 ± 1.5

1.8 ± 1.4

0.359