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Table 6 Association between birth weight for gestational age and fat-free mass indicators

From: Prematurity and body composition at 6, 18, and 30 years of age: Pelotas (Brazil) 2004, 1993, and 1982 birth cohorts

 

FFM (kg)

%FFM

FFMI (kg/m2)

β (CI95%)

β (CI95%)

β (CI95%)

Gestational age

Crude

Adjusted

Crude

Adjusted

Crude

Adjusted

Male

 6 y (2004 Cohort)

p < 0.001

p = 0.031

p = 0.246

p = 0.175

p < 0.001

p < 0.001

  SGA

−1.39 (− 1.91; −0.87)

−0.09 (− 0.46; 0.29)

1.12 (− 0.32; 2.57)

−1.07 (− 0.43; 2.13)

−0.39 (− 0.55; − 0.23)

−0.40 (− 0.60; − 0.20)

  AGA

ref

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  LGA

1.10 (0.73; 1.47)

0.35 (0.08; 0.62)

−0.24 (−1.27; 0.78)

0.85 (− 0.43; 2.13)

0.34 (0.23; 0.46)

0.27 (0.12; 0.42)

 18 y (1993 Cohort)

p = 0.181

p = 0.496

p = 0.333

p = 0.121

p = 0.380

p = 0.208

  SGA

0.99 (−0.11; 2.09)

0.47 (−0.40; 1.34)

− 0.14 (−1.47; 1.18)

−0.02 (− 1.37; 1.33)

0.12 (− 0.29; 0.53)

0.06 (− 0.35; 0.48)

  AGA

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  LGA

0.45 (−0.62; 1.53)

−0.15 (− 0.99; 0.69)

−0.97 (− 2.26; 0.31)

−1.36 (− 2.67; 0.05)

0.27 (− 0.13; 0.67)

0.37 (− 0.04; 0.77)

 30 y (1982 Cohort)

p = 0.327

p = 0.599

p = 0.968

p = 0.754

p = 0.774

p = 0.697

  SGA

−0.54 (−1.95; 0.86)

0.63 (− 0.60; 1.86)

0.12 (− 1.50; 1.74)

−0.08 (− 1.79; 1.63_

0.03 (− 0.33; 0.40)

0.17 (− 0.23; 0.57)

  AGA

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  LGA

−0.85 (− 2.05; 0.35)

0.16 (− 0.92; 1.24)

−0.13 (−1.52; 1.25)

−0.56 (− 2.02; 0.90)

−0.10 (− 0.41; 0.21)

0.02 (− 0.33; 0.37)

Female

 6 y (2004 Cohort)

p < 0.001

p = 0.633

p = 0.011

p = 0.738

p < 0.001

p = 0.010

  SGA

−1.03 (− 1.58; −0.49)

−0.17 (− 0.63; 0.29)

1.44 (− 0.14; 3.01)

−0.75 (− 2.81; 1.30)

−0.33 (− 0.50; − 0.15)

−0.13 (− 0.37; 0.10)

  AGA

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ref

ref

ref

ref

ref

  VLGA

0.96 (0.59; 1.33)

0.08 (−0.22; 0.39)

−1.18 (− 2.26; − 0.11)

0.16 (− 1.21; 1.53)

0.28 (0.17; 0.40)

0.22 (0.06; 0.37)

 18 y (1993 Cohort)

p = 0.361

p = 0.411

p = 0.170

p = 0.348

p = 0.102

p = 0.267

  SGA

0.47 (−0.24; 1.17)

0.36 (−0.23; 0.94)

− 0.95 (−2.04; 0.15)

−0.67 (−1.75; 0.40)

0.40 (− 0.00; 0.81)

0.30 (− 0.10; 0.70)

  AGA

ref

ref

ref

ref

ref

ref

  LGA

−0.15 (− 0.93; 0.63)

0.26 (− 0.39; 0.91)

0.32 (− 0.89; 1.53)

0.34 (− 0.85; 1.54)

−0.13 (− 0.58; 0.32)

−0.11 (− 0.56; 0.33)\

 30 y (1982 Cohort)

p = 0.512

p = 0.698

p = 0.093

p = 0.132

p = 0.435

p = 0.679

  SGA

0.08 (−0.85; 1.01)

0.37 (−0.49; 1.22)

− 0.70 (−2.12; 0.71)

−0.15 (−1.65; 1.34)

0.18 (− 0.12; 0.49)

0.15 (− 0.18; 0.47)

  AGA

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  LGA

−0.48 (−1.33; 0.37)

0.11 (− 0.67; 0.89)

1.18 (− 0.12; 2.47)

1.34 (− 0.01; 2.69)

−0.05 (− 0.33; 0.23)

0.02 (− 0.27; 0.32)

  1. FFM fat-free mass, %FFM percentage of fat-free mass, FFMI fat-free mass index, SGA small for gestational age, AGA adequate for gestational age, LGA large for gestational age
  2. β refers to linear regression models. Models were adjusted for maternal (education, age, family income at birth, smoking during pregnancy, and pre-gestational BMI) and the cohort participant characteristics (skin color and height (except for FMI and BMI))
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BMC Public Health

ISSN: 1471-2458

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