Table 2 Body composition, anthropometries, and Bayley Scale of Infants Development (Bayley-III).

From: Fat-free mass is associated with neurodevelopment outcomes in extremely preterm infants up to 3 years of age

Patient group

n = 105

Body composition and growth parameter

 Postmenstrual age, weeks (median, IQR)

41.2 (39.9, 44.2)

 FFM, (%, IQR)

79.7 (75.1, 83.4)

 FM, (%, IQR)

20.3 (16.6, 25.0)

 FFM, gram (median, IQR)

2702 (2219, 3132)

 FM, gram (median, IQR)

680 (501, 918)

 FFM, Z-Score (mean, 95% CI)

−1.5 (−2.5, −0.4)

 FM, Z-Score (mean, 95% CI)

1.0 (0.4, 1.7)

 Weight, gram (median, IQR)

3396 (2907, 3970)

 Weight, Z-Score (mean, 95% CI)

−1.0 (−1.6, −0.6)

 Length, cm (median, IQR)

50.0 (48.0, 52.0)

 Length, Z-Score (mean, 95% CI)

−1.3 (−2.2, −0.5)

 HC, cm (median, IQR)

35 (33, 36)

 HC, Z-Score (mean, 95% CI)

−0.6 (−2.2, −0.5)

 Weight Z-Score changes, from birth to term-equivalent age

−0.9 (−1.4, −0.3)

 Length Z-Score changes, from birth to term-equivalent age

−1.0 (−1.8, −0.6)

 HC, Z-Score changes, from birth to term-equivalent age

−0.5 (−1.3, −1.0)

Bayley Scales at 1 year of age

 Cognition (median, IQR)

90 (80, 100)

 Language (median, IQR)

100 (87, 106)

 Motor (median, IQR)

92 (82, 103)

 Weight, kg (median, IQR)

9.0 (8.5, 10.2)

 Length, cm (median, IQR)

77.4 (75.6, 79.3)

 HC, cm (median, IQR)

46.5 (44.0, 48.0)

Bayley Scales at 2 years of age

 Cognition (median, IQR)

80 (70, 99)

 Language (median, IQR)

75 (57, 87)

 Motor (median, IQR)

89 (79, 106)

 Weight, kg (median, IQR)

12.8 (12.0, 13.8)

 Length, cm (median, IQR)

88.0 (86.3, 90.1)

 HC, cm (median, IQR)

48.5 (47.0, 49.5)

Bayley Scales at 3 years of age

 Cognition (median, IQR)

90 (75, 95)

 Language (median, IQR)

81 (69, 91)

 Motor (median, IQR)

79 (64, 85)

 Weight, kg (median, IQR)

15.9 (14.7, 16.8)

 Length, cm (median, IQR)

93.5 (92.1, 94.7)

 HC, cm (median, IQR)

49.5 (48.5, 50.5)

  1. Data presented in median and IQR (interquartile range), mean and 95% confidence intervals, and percentages (%).
  2. FFM Fat-free mass, FM Fat mass, HC Head circumference.