Table 1—

Anthropometric and physiological characteristics for boys and girls (N = 296)

VariableBoysGirlsP*BlackWhiteP
n
 Black3717
 White1271150.03
Birth data
 Birth weight (g)3,484 ± 473,371 ± 420.073,259 ± 603,473 ± 360.003
 Birth length (cm)52.3 ± 0.351.8 ± 0.20.152.2 ± 0.552.1 ± 0.20.8
 Ponderal index (kg/m3)24.3 ± 0.324.2 ± 0.30.823.3 ± 0.524.5 ± 0.230.11
Adolescent data
 Age at clinic (years)15.0 ± 0.114.9 ± 0.10.214.4 ± 0.214.9 ± 0.10.05
 Tanner Stage4.5 ± 0.14.6 ± 0.10.64.3 ± 0.13.9 ± 0.10.0006
 Height (cm)174.2 ± 0.6164.6 ± 0.6<0.0001169.3 ± 0.1170.1 ± 0.50.5
 Weight (kg)71.1 ± 1.364.5 ± 1.40.000768.5 ± 2.268.1 ± 1.00.9
  LBM (kg)48.8 ± 0.640.1 ± 0.6<0.000146.1 ± 1.044.6 ± 0.50.2
 Fat mass (kg)22.3 ± 1.324.4 ± 1.50.322.3 ± 1.323.4 ± 1.50.7
 BMI (kg/m2)23.3 ± 0.423.8 ± 0.40.623.9 ± 0.723.4 ± 0.30.5
 LMI (kg/m2)16.0 ± 0.214.8 ± 0.2<0.000115.9 ± 0.315.4 ± 0.10.05
 FMI (kg/m2)7.3 ± 0.49 ± 0.50.017.9 ± 0.88.1 ± 0.40.8
 Systolic BP111.4 ± 0.6105.4 ± 0.7<0.0001110.3 ± 1.1108.3 ± 0.50.1
 Diastolic BP54.3 ± 1.159.6 ± 1.20.00158.5 ± 1.956.3 ± 0.80.3
Laboratory data
 Insulin (mU/l)15.3 ± 0.715.1 ± 0.80.815.5 ± 1.315.2 ± 0.60.8
 MLBM (mg · kg LBM−1 · min−1)12.8 ± 0.311.7 ± 0.40.0512.4 ± 0.612.3 ± 0.30.9
 Cholesterol (mmol/l)3.8 ± 0.063.8 ± 0.060.83.8 ± 0.13.8 ± 0.050.6
 HDL-C (mmol/l)1.2 ± 0.021.1 ± 0.020.0031.2 ± 0.031.1 ± 0.020.02
 LDL-C (mmol/l)2.2 ± 0.062.2 ± 0.050.92.2 ± 0.052.2 ± 0.050.8
 Triglycerides (mmol/l)1.03 ± 0.040.89 ± 0.040.030.8 ± 0.071.0 ± 0.030.01
  • Data are means ± SE unless otherwise indicated. Birth data, race, tanner stage, and age are unadjusted means. Other values are adjusted by linear regression for age, sex, Tanner stage, race, and screening blood pressure strata.

  • *

    * P for F-test. BP, blood pressure; FMI, fat mass index; LBM, lean body mass; LMI, lean mass index.