Table 1 Comparison of baseline characteristics in case group and control group^a

 n (%)

681 (34.55)

1290 (65.45)

–

 Age, years

7.02 (6.21, 7.84)

7.06 (6.30, 7.91)

0.5

  ≤ 37

13.72

12.84

0.3

 38–40

69.81

73.62

  ≥ 41

15.56

13.69

Birth weight, kg

3.22 (2.90, 3.52)

2.61 (2.23, 3.46)

0.03

Breastfeeding for 6 months (%)

52.42

68.68

< 0.0001

High household income level ^b (%)

24.67

23.64

0.6

High maternal education level ^c (%)

25.70

22.40

0.1

High paternal education level ^c (%)

26.28

25.66

0.8

Maternal overweight ^d (%)

45.37

38.14

0.002

Paternal overweight ^d (%)

47.28

40.70

0.005

Maternal menarche age

12.31

(11.03, 14.17)

12.82

(11.53, 14.42)

0.06

Overweight ^e (%)

16.89

9.07

< 0.0001

Obesity ^e (%)

12.28

3.49

< 0.0001

 n (%)

165 (31.43)

360 (68.57)

–

 Age, years

8.22 (7.54, 8.83)

8.23 (7.67, 8.90)

0.6

  ≤ 37

13.89

12.37

0.4

 38–40

69.74

73.10

  ≥ 41

16.37

14.53

Birth weight, kg

3.42 (2.89, 3.98)

3.37 (2.75, 3.81)

0.1

Breastfeeding for 6 months (%)

58.18

68.89

0.02

High household income level ^b (%)

24.24

26.94

0.5

High maternal education level ^c (%)

18.79

24.17

0.2

High paternal education level ^c (%)

24.85

25.28

0.9

Maternal overweight ^d (%)

41.82

37.22

0.3

Paternal overweight ^d (%)

43.64

41.39

0.6

Maternal menarche age

12.52

(11.01, 14.24)

12.73

(11.14, 14.45)

0.1

Overweight ^e (%)

20.61

14.44

0.03

Obesity ^e (%)

14.18

8.34

0.02