Table 1 Basic demographical characteristics of subjects

Gender (male/female)

64/64

58/55

58/68

60/63

0.74

0.86

Age (months)

315.20 (36.40)

295.16 (44.66)

293.96 (46.78)

289.95 (48.69)

8.23

 < 0.001

Education (years)

17.34 (2.47)

16.58 (2.74)

16.63 (2.24)

16.63 (2.41)

2.78

0.040

Height

167.17 (7.31)

168.20 (7.94)

168.90 (7.87)

169.64 (8.40)

2.24

0.083

Weight

61.21 (11.40)

61.51 (11.63)

60.53 (11.66)

64.35 (14.11)

2.34

0.073

Father Age at Birth

27.19 (6.22)

26.82 (5.78)

27.54 (4.97)

29.37 (4.31)

5.34

0.001

Father Education (years)

8.95 (3.05)

10.30 (3.41)

11.79 (3.45)

14.11 (3.32)

53.53

 < 0.001

Mother Age at Birth

26.09 (4.73)

25.73 (5.46)

25.86 (4.03)

27.42 (3.47)

3.71

0.012

Mother Education (years)

7.23 (3.72)

8.61 (3.94)

11.13 (3.44)

13.75 (3.17)

80.14

 < 0.001

Parents’ Marriage (Normal/Other)

110/18

103/10

108/18

99/24

5.48

0.14

Single Child (Yes/No)

17/111

35/78

66/60

110/13

160.59

 < 0.001

MCCB T Score

50.45 (4.67)

51.68 (5.08)

53.19 (4.16)

55.11 (4.50)

23.71

 < 0.001

Total GMV

732.92 (57.51)

746.14 (65.44)

748.81 (57.07)

755.54 (66.52)

2.99

0.031