Table 1 Characteristics of the seven cohortsa.

From: Understanding the pathways between prenatal and postnatal factors and overweight outcomes in early childhood: a pooled analysis of seven cohorts

 

BIS

HB

InFANT

InFANT Extend (n = 243)

LIMIT (n = 1230)

Nourish

POI

(n = 562)

(n = 275)

(n = 352)

(n = 395)

(n = 515)

Intervention allocation

Control

n/a

49.5%

49.3%

49.2%

49.8%

52.0%

51.2%

Intervention

50.5%

50.7%

50.8%

50.2%

48.0%

48.8%

Maternal factors

Maternal age (years)

31.8 ± 4.3

27.4 ± 5.3

32.5 ± 4.1

32.5 ± 4.2

30.0 ± 5.3

31.9 ± 5.0

32.7 ± 4.6

Maternal education

 Non-tertiary

44.3%

32.5%

40.3%

38.7%

n/a

30.1%

31.8%

 Tertiary

55.7%

67.5%

59.7%

61.3%

69.9%

68.2%

Maternal pre-pregnancy BMI (kg/m2)

25.2 ± 5.1

25.3 ± 5.4

24.1 ± 5.2

24.2 ± 4.6

32.2 ± 5.8

25.7 ± 5.2

25.1 ± 4.9

 Normal weight

57.8%

56.4%

67.1%

63.8%

0.0%

53.7%

60.2%

 Overweight

27.1%

28.0%

21.3%

26.3%

44.2%

29.4%

26.2%

 Obesity

15.1%

15.6%

11.6%

9.9%

55.9%

17.0%

13.6%

Child factors

Child age at assessment in infancy (years)

1.1 ± 0.1

1.0 ± 0.0

0.8 ± 0.1

0.8 ± 0.2

0.6 ± 0.2

1.1 ± 0.1

1.0 ± 0.0

Child age at assessment in early childhood (years)

4.1 ± 0.2

5.0 ± 0.1

5.1 ± 0.2

3.2 ± 0.1

3.3 ± 0.5

5.0 ± 0.0

5.0 ± 0.0

Gestational age

 Premature (<37 weeks)

4.1%

n/a

11.4%

7.9%

5.4%

n/a

0

 Full term (≥37 weeks)

95.9%

88.6%

92.1%

94.6%

100%

Child sex

 Boys

53.7%

53.1%

52.3%

50.2%

49.6%

48.1%

51.8%

 Girls

46.3%

46.9%

47.7%

49.8%

50.4%

51.9%

48.2%

Infant birth weight (kg)

3.5 ± 0.5

3.4 ± 0.6

3.3 ± 0.6

3.3 ± 0.6

3.5 ± 0.5

3.5 ± 0.4

3.6 ± 0.5

 <2.5 kg

2.5%

5.5%

6.8%

7.0%

3.3%

0.0%

0.8%

 2.5–4 kg

79.7%

84.0%

82.4%

83.5%

79.8%

89.6%

83.1%

 ≥4 kg

17.8%

10.6%

10.8%

9.5%

16.9%

10.4%

16.1%

Breastfeeding duration

 <6 months

34.2%

56.0%

33.3%

24.3%

44.4%

29.1%

25.1%

 ≥6 months

65.8%

44.0%

66.8%

75.7%

55.6%

70.9%

75.0%

Infant rapid weight gain

 Yes

25.6%

36.0%

29.0%

30.9%

23.2%

29.1%

21.2%

 No

74.4%

64.0%

71.0%

69.1%

76.8%

70.9%

78.8%

Child BMI z-score in early childhood

0.2 ± 1.3

0.6 ± 1.0

0.5 ± 1.0

0.8 ± 0.9

0.8 ± 1.0

0.4 ± 0.9

0.5 ± 0.9

Underweight/normal weight

88.6%

78.6%

84.1%

85.6%

77.6%

87.9%

84.7%

Overweight/obesity

11.4%

21.5%

15.9%

14.4%

22.4%

12.2%

15.3%

  1. Values are presented as % or mean ± standard deviation, n/a: not available.
  2. aBIS Barwon Infant Study, HB Healthy beginnings, INFANT Infant Feeding Activity and Nutrition Trial, POI Prevention of Obesity in Infancy trial.