Table 2 Body composition and anthropometric data according to type of feeding

From: Higher fat mass and fat mass accretion during the first six months of life in exclusively breastfed infants

 

EBF

nEBF

 

All

Girls

Boys

All

Girls

Boys

T1 [4.9 (3.6–8.7) weeks]

n = 18

n = 5

n = 13

n = 67

n = 33

n = 34

 Body composition

      

  kgFM

0.81 ± 0.31

0.97 ± 0.39

0.74 ± 0.26

0.70 ± 0.27

0.70 ± 0.24

0.71 ± 0.30

  %FM

19.2 (15.3–22.4)

22.9 (16.0-27.5)

18.9 (13.4–21.8)

17.9 (12.2–20.9)

18.3 (12.3–21.0)

16.7 (12.0–20.9)

  FMI (kgFM/length2)

2.9 ± 1.1

3.6 ± 1.4§

2.7 ± 1.0

2.5 ± 0.9

2.6 ± 0.8§

2.5 ± 0.9

 Anthropometry

      

  Weight (g)

4270 ± 550

4313 ± 735

4255 ± 502

4115 ± 504

3992 ± 406

4249 ± 568

  Length (cm)

52.5 ± 1.8

51.9 ± 2.1

52.7 ± 1.7

52.3 ± 2.2

51.9 ± 2.2

52.6 ± 2.1

  BMI

15.5 ± 1.8

16.0 ± 2.3

15.3 ± 1.4

15.0 ± 1.1

15.5 ± 1.8

15.5 ± 1.8

T2 [13.4 (11.0–17.4) weeks

n = 27

n = 10

n = 17

n = 74

n = 36

n = 38

 Body composition

      

  kgFM

1.64 ± 0.51*

1.74 ± 0.54§§

1.57 ± 0.49

1.42 ± 0.40*

1.30 ± 0.35†, §§

1.53 ± 0.41

  %FM

27.1 ± 5.7**

28.9 ± 5.3§§

26.0 ± 5.8

24.0 ± 4.8**

23.5 ± 4.7§§

24.4 ± 4.9

  FMI (kgFM/length2)

4.7 ± 1.3*

5.1 ± 1.3§§

4.5 ± 1.3

4.1 ± 1.1*

3.9 ± 1.0§§

4.3 ± 1.1

  %FM T2 – %FM T1

8.9 ± 5.7

9.7 ± 5.8

8.6 ± 5.9

7.3 ± 4.4

6.0 ± 3.9

8.5 ± 4.5

 Anthropometry

      

  Weight (g)

5973 ± 803

5794 ± 839

6017 ± 803

5808 ± 718

5475 ± 614

6142 ± 664

  Length (cm)

58.6 ± 2.0

57.9 ± 2.0

59.0 ± 2.0

58.4 ± 2.1

57.4 ± 2.1

59.3 ± 1.7

  BMI

17.3 ± 1.5

17.5 ± 1.5

17.2 ± 1.6

17.0 ± 1.5

16.6 ± 1.4

17.4 ± 1.6

T3 [26.4 (21.3–38.1) weeks]

n = 20

n = 8

n = 12

n = 72

n = 38

n = 34

 Body composition

      

  kgFM

2.22 ± 0.67**

2.54 ± 0.76§§§

2.00 ± 0.54

1.79 ± 0.53**

1.69 ± 0.48§§§

1.91 ± 0.57

  %FM

29.7 ± 5.9**

32.5 ± 6.3§§

27.9 ± 5.1

24.7 ± 5.6**

24.5 ± 5.6§§

24.9 ± 5.7

  FMI (kgFM/length2)

5.4 ± 1.6**

6.3 ± 1.7‡, §§§

4.8 ± 1.2

4.3 ± 1.2**

4.2 ± 1.1§§§

4.5 ± 1.3

  %FM T3 – %FM T1

11.5 (6.6–14.6)

11.5 (5.0–17.3)

11.6 (6.6–14.6)

7.3 (5.1–11.1)

7.2 (3.8–10.9)

7.6 (5.9–11.5)

  %FM T3 – %FM T2

2.2 ± 2.7

2.9 ± 2.3

1.8 ± 2.9

1.3 ± 3.8

1.6 ± 3.6

1.0 ± 4.0

 Anthropometry

      

  Weight (g)

7518 ± 988

7675 ± 1018

7424 ± 992

7197 ± 868

6866 ± 70

7545 ± 895

  Length (cm)

64.6 ± 2.4

63.8 ± 2.7

65.1 ± 2.2

64.3 ± 2.6

63.4 ± 2.2

65.3 ± 2.7

  BMI

18.0 ± 2.0

18.8 ± 2.1

17.5 ± 1.7

17.4 ± 1.5

17.1 ± 1.3

17.7 ± 1.7

  1. Data is showed either as Mean ± SD. Median (25° percentile–75° percentile)
  2. t test: EBF vs nEBF, *p < 0.05, **p < 0.01; EBF (girls vs boys), p = 0.0034; nEBF (girls vs boys), p < 0.05; girls (EBF vs nEBF), §p < 0.05, §§p < 0.01, §§§p < 0.001
  3. EBF exclusive/predominant breastfeeding, nEBF non-exclusive/predominant breastfeeding, T1/T2/T3 Median (Min–Max) weeks time frame at each assessment, kgFM kilograms of fat mass, %FM fat mass percentage, FMI fat mass index, BMI body-mass-index