TABLE 1.

Age, Maturational Stage, Dietary Intake, and Activity of 5461 Girls in GUTS in 1998

Mean (SD) age, y13.9 (1.6)
Mean (SD) BMI, kg/m220.1 (3.3)
Mean (SD) BMI z score0.1 (0.9)
Mean (SD) age at menarche, y12.0 (1.1)
% Postmenarcheal67.8 (n = 3638)
% Underweight7.1 (n = 386)
% Overweight14.9 (n = 814)
% Disordered eating3.1 (n = 172)
Mean (SD) calcium intake, mg/d1121 (491)
Mean (SD) vitamin D intake, IU/d314 (218)
Mean (SD) daily servings of dairy1.8 (1.2)
% with moderate or vigorous activity of*
    <1 h/wk3.7 (n = 204)
    1–3.9 h/wk17.5 (n = 957)
    4–7.9 h/wk27.5 (n = 1503)
    8–11.9 h/wk21.2 (n = 1156)
    12–15.9 h/wk14.3 (n = 782)
    16–19.9 h/wk7.9 (n = 430)
    20–24.9 h/wk5.0 (n = 274)
    ≥25 h/wk2.8 (n = 155)
Mean (SD) time of nonimpact activity, h/wk3.6 (3.3)
Mean (SD) time of intermediate-impact activity, h/wk1.7 (2.3)
Mean (SD) time of high-impact activity, h/wk4.2 (4.2)
  • * Sum of basketball, baseball, biking, dance/aerobics, hockey, running, swimming, skating, skateboarding, soccer, tennis, cheerleading, lifting weights, volleyball, and karate.

  • Sum of basketball, running, soccer, tennis, cheerleading, and volleyball.