Table 1

Weight trajectories since birth and current body composition in young, normal-weight Japanese women with low, normal and high percentage body fat

Percentage body fat*
LowNormalHigh
n=67n=160n=24
Weight (g or kg) at birth3166 ± 4093211 ± 3813178 ± 401
 At 12 years41.0 ± 5.244.1 ± 6.045.2 ± 9.2†‡
 At 15 years47.1 ± 4.349.8 ± 5.653.3 ± 6.4†‡§
 At 20 years48.8 ± 3.852.5 ± 4.556.9 ± 4.6†‡§
ΔWeight0–12 (kg)37.8 ± 5.140.9 ± 5.942.0 ± 9.1†‡
Height (cm) at 12 years148.8 ± 6.2151.9 ± 5.5150.7 ± 9.0
 At 15 years155.4 ± 5.4157.6 ± 4.6157.7 ± 5.3
 At 20 years158.3 ± 5.4159.1 ± 4.8159.4 ± 4.9
BMI (kg/m2) at 12 years18.4 ± 1.819.1 ± 2.019.7 ± 2.7
 At 15 years19.5 ± 1.320.0 ± 1.821.4 ± 2.0
 At 20 years19.5 ± 0.820.7 ± 1.322.4 ± 1.6†‡§
Waist (cm)68.1 ± 4.172.2 ± 4.478.6 ± 3.7†‡§
Percentage body fat (%)22.9 ± 1.929.3 ± 2.736.7 ± 1.5†‡§
Percentage trunk fat (%)23.1 ± 2.430.4 ± 3.638.6 ± 2.2†‡§
%ASM (%)30.6 ± 1.428.4 ± 1.625.5 ± 1.4†‡§
Trunk/leg fat ratio1.19 ± 0.201.28 ± 0.251.36 ± 0.23†‡
ASMI (kg/m2)6.0 ± 0.45.9 ± 0.55.7 ± 0.5
FMI (kg/m2)4.4 ± 0.56.0 ± 0.88.1 ± 0.8†‡§
  • Mean±SD ΔWeight0–12: weight gain from birth to age 12 years.

  • *P<0.05 or less by Bonferroni's multiple comparison procedure.

  • †Low versu normal.

  • ‡Low versus high.

  • §Normal versus high.

  • ASM, appendicular skeletal muscle mass; BMI, body mass index; FMI, fat mass index.