Table 1 Anthropometric and body composition data of infants.

From: Development and validation of anthropometric-based fat-mass prediction equations using air displacement plethysmography in Mexican infants

Measurement

All

Girls

Boys

All

Girls

Boys

All

Girls

Boys

1 month of age

3 months of age

6 months of age

 

n = 133

n = 67

n = 66

n = 105

n = 51

n = 54

n = 101

n = 53

n = 48

Weight (kg)

4.08 (0.51)

3.97 (0.50)

4.20 (0.50)*

5.93 (0.74)

5.68 (0.67)

6.16 (0.74)*

7.29 (0.84)

7.02 (0.74)

7.58 (0.83)*

Length (cm)

52.43 (1.87)

52.01 (1.78)

52.86 (1.87)*

59.17 (2.19)

58.31 (1.71)

59.99 (2.30)**

65.02 (2.16)

64.31 (2.06)

65.79 (2.01)**

Body mass index (kg/m2)

14.83 (1.36)

14.66 (1.33)

15.00 (1.38)

16.92 (1.66)

16.71 (1.63)

17.11 (1.67)

17.22 (1.48)

16.96 (1.40)

17.49 (1.51)

Head circumference (cm)

36.74 (1.15)

36.68 (1.16)

37.10 (1.02)**

39.93 (1.26)

39.35 (1.21)

40.48 (1.06)**

42.52 (1.36)

41.99 (1.36)

43.09 (1.11)**

Mid-upper arm circumference (cm)

11.07 (1.00)

10.93 (0.96)

11.20 (1.03)

13.12 (1.04)

12.92 (0.98)

13.30 (1.07)

13.94 (1.09)

13.68 (0.94)

14.28 (1.14)*

Waist circumference (cm)

34.41 (2.27)

34.41 (2.13)

34.41 (2.43)

39.28 (2.64)

38.86 (2.35)

39.67 (2.85)

40.96 (2.35)

40.52 (2.14)

41.44 (2.48)

Thigh circumference (cm)

16.85 (1.55)

16.85 (1.46)

16.85 (1.64)

21.41 (1.69)

21.27 (1.78)

21.53 (1.62)

23.75 (1.97)

23.43 (1.92)

24.08 (1.97)

Calf circumference (cm)

12.66 (1.10)

12.60 (0.98)

12.72 (1.21)

15.81 (1.18)

15.61 (1.14)

16.00 (1.20)

17.37 (1.40)

17.22 (1.30)

17.52 (1.49)

Biceps skinfold (mm)

3.67 (1.09)

3.56 (1.06)

3.78 (1.12)

4.81 (1.34)

4.66 (1.24)

4.96 (1.42)

5.19 (1.38)

5.17 (1.45)

5.22 (1.31)

Triceps skinfold (mm)

6.27 (1.55)

6.26 (1.49)

6.29 (1.62)

8.51 (1.98)

8.56 (2.11)

8.45 (1.87)

8.77 (2.00)

8.99 (2.19)

8.53 (1.76)

Subscapular skinfold (mm)

6.27 (1.68)

6.39 (1.62)

6.15 (1.75)

8.16 (2.18)

8.13 (1.88)

8.18 (2.45)

7.69 (1.95)

7.94 (1.89)

7.41 (1.99)

Waist skinfold (mm)

4.94 (1.50)

5.06 (1.50)

4.81 (1.51)

8.00 (2.33)

8.02 (2.20)

7.98 (2.47)

7.99 (2.14)

8.01 (2.07)

7.95 (2.23)

Thigh skinfold (mm)

9.13 (2.38)

9.17 (2.32)

9.10 (2.46)

14.90 (3.19)

14.96 (3.17)

14.84 (3.24)

17.29 (3.18)

17.41 (2.96)

17.16 (3.44)

Calf skinfold (mm)

8.38 (1.90)

8.60 (2.03)

8.16 (1.75)

12.66 (2.43)

12.77 (2.27)

12.56 (2.59)

14.40 (2.48)

14.47 (2.25)

14.33 (2.73)

Fat mass (%)

16.35 (19.15)

18.42 (26.58)

14.25 (4.29)

1.32 (0.48)

1.31 (0.47)

1.33 (0.50)

1.76 (0.58)

1.79 (0.55)

1.73 (0.60)

  1. Anthropometric data expressed as mean (SD).
  2. Student’s t-test: *p < 0.01, **p < 0.001.
  3. Bold values indicates statistical significant P values
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