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Table 3 Association between gestational age and body fat indicators

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

  FM (kg) %FM FMI (kg/m2) BMIa (kg/m2)
β (CI95%) β (CI95%) β (CI95%) β (CI95%)
Gestational age Crude Adjusted Crude Adjusted Crude Adjusted Crude Adjusted
Male
6 y (2004 Cohort) p < 0.001 p = 0.046 p < 0.001 p = 0.008 p < 0.001 p = 0.004 p < 0.001 p < 0.001
   ≤ 33 − 1.29 (−2.50; − 0.09) 0.22 (− 1.06; 1.51) − 2.72 (−5.31; − 0.14) − 0.67 (− 3.64; 2.30) − 0.76 (− 1.47; − 0.06) − 0.54 (− 1.38; − 0.31) − 0,76 (− 1.26; − 0.26) − 0.78(− 1.36; 0.20)
  34 to 36 − 0.97 (− 1.54; − 0.39) − 0.80 (− 1.45; − 0.16) − 2.32 (− 5.31; − 0.14) −2.39 (− 3.90; − 0.88) − 0.57 (− 0.91; − 0.23) −0.70 (− 1.13; − 0.27) −0.60 (− 0.84; − 0.36) −0.69 (− 0.99; − 0.40)
  37 to 41 ref ref ref ref ref ref ref ref
18 y (1993 Cohort) p = 0.873 p = 0.469 p = 0.711 p = 0.461 p = 0.938 p = 0.754 p = 0.839 p = 0.951
   ≤ 33 −0.36 (− 3.75; 3.02) −0.94 (− 4.81; 2.93) − 1.16 (− 4.26; 1.94) − 1.57 (− 4.73; 1.59) −0.10 (− 0.63; 0.44) −0.31 (− 1.25; 0.63) 0.02 (− 1.45; 1.48) 0.10 (− 1.75; 1.96)
  34 to 36 −0.41 (− 2.08; 1.25) 0.59 (− 1.19; 2.38) −0.32 (− 1.84; 1.20) 0.59 (− 1.05; 2.24) − 0.01 (− 1.10; 1.08) 0.09 (− 0.40; 0.57) − 0.22 (− 0.95; 0.51) −0.11 (− 0.87; 0.64)
  37 to 41 ref ref ref ref ref ref ref ref
30 y (1982 Cohort) p = 0.053 p = 0.102 p = 0.013 p = 0.085 p = 0.037 p = 0.114 p = 0.290 p = 0.319
   ≤ 33 13.53 (2.20; 24.87) 15.67 (0.25; 31.09) 13.13 (4.24; 22.0) 13.52 (1.17; 25.87) 4.59 (0.96; 8.22) 5.11 (0.09; 10.13) 3.68 (− 1.17; 8.54) 3.98 (− 2.64; 10.61)
  34 to 36 −0.62 (− 2.64; 1.40) −0.78 (− 2.86; 1.29) −0.46 (− 2.04; 1.12) −0.46 (− 2.10; 1.19) −0.21 (− 0.85; 0.44) −0.19 (− 0.86; 0.47) −0.21 (− 1.08; 0.65) −0.42 (− 1.31; 0.47)
  37 to 41 ref ref ref ref ref ref ref ref
Female
6 y (2004 Cohort) p = 0.002 p = 0.539 p = 0.001 p = 0.442 p = 0.003 p = 0.113 p = 0.004 p = 0.116
   ≤ 33 −1.01 (− 2.34; 0.33) −0.16 (− 2.00; 1.69 − 1.54 (− 3.58; − 1.02) −0.86 (− 5.04; 3.31) −0.44 (− 1.25; 0.37) −0.49 (− 0.99; 0.00) −0.21 (− 0.68; 0.27) −0.31 (− 1.03; 0.42)
  34 to 36 −1.06 (− 1.69; − 0.44) −0.40 (− 1.12; 0.31) − 2.30 (− 4.29; 1.20) −1.03 (− 2.66; 0.60) −0.63 (− 1.01; − 0.26) −0.57 (− 1.85; 0.71) −0.32 (− 0.54; − 0.10) −0.28 (− 0.56; 0.00)
  37 to 41 ref ref ref ref ref ref ref ref
18 y (1993 Cohort) p = 0.666 p = 0.554 p = 0.519 p = 0.418 p = 0.710 p = 0.442 p = 0.746 p = 0.440
   ≤ 33 −1.34 (− 4.27; 1.58) − 1.53 (− 4.39; 1.34) −1.41 (− 3.83; 1.01) −1.52 (− 4.07; 1.04) −0.47 (− 1.58; 0.65) − 0.62 (− 1.66; 0.43) −0.40 (− 1.89; 1.09) −0.76 (− 2.10; 0.58)
  34 to 36 − 0.05 (− 1.74; 1.65) 0.20 (− 1.46; 1.85) − 0.13 (− 1.53; 1.28) 0.37 (− 0.97; 1.72) 0.02 (− 0.63; 0.66) 0.14 (− 0.46; 0.74) 0.23 (− 0.63; 1.10) 0.22 (− 0.55; 1.00)
  37 to 41 ref ref ref ref ref ref ref ref
30 y (1982 Cohort) p = 0.401 p = 0.535 p = 0.262 p = 0.369 p = 0.426 p = 0.569 p = 0.434 p = 0.459
   ≤ 33 −4.10 (− 14.76; 6.56) − 2.59 (− 12.73; 7.54) −0.37 (− 7.82; 7.09) 0.18 (− 6.95; 7.32) −1.39 (− 5.43; 2.65) − 1.06 (− 4.92; 2.81) −2.55 (− 7.80; 2.70) −2.29 (− 7.32; 2.74)
  34 to 36 −1.17 (− 3.17; 0.84) −1.07 (− 3.16; 1.01) −1.17 (− 2.57; 0.23) −1.04 (− 2.50; 0.41) −0.44 (− 1.20; 0.32) −0.37 (− 1.16; 2.81) −0.45 (− 1.44; 0.54) −0.49 (− 1.57; 0.59)
  37 to 41 ref ref ref ref ref ref ref ref
  1. FM fat mass, %FM percentage of fat mass, FMI fat mass index, BMI body mass index
  2. aAt 6 years, BMI in Z-score
  3. 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 (birth weight