TABLE 1

Baseline Characteristics of Athletes With Amenorrhea, Athletes With Eumenorrhea, and Control Subjects

Athletes With Amenorrhea (N = 21)Athletes With Eumenorrhea (N = 18)Control Subjects (N = 18)P
Age, mean ± SD, y16.1 ± 1.515.6 ± 1.415.5 ± 1.4NS
Bone age, mean ± SD, y16.0 ± 1.016.0 ± 1.315.6 ± 1.6NS
BMI, mean ± SD, kg/m219.1 ± 1.3a,b21.9 ± 3.220.7 ± 2.5.003
BMI z score, mean ± SD−0.61 ± 0.29b0.16 ± 0.76−0.14 ± 0.57.0003
Weight, mean ± SD, kg50.6 ± 4.3b58.1 ± 8.055.4 ± 7.0.003
Height, mean ± SD, cm163.0 ± 5.8163.0 ± 5.9163.7 ± 5.6NS
Height z score, mean ± SD0.12 ± 0.890.14 ± 0.990.27 ± 0.90NS
Fat mass, mean ± SD, kg11.2 ± 2.7a,b16.2 ± 4.615.1 ± 5.3.001
Lean mass, mean ± SD, kg39.2 ± 4.341.8 ± 5.339.7 ± 3.6NS
Activity score, mean ± SD23.8 ± 6.6a28.1 ± 10.3a9.9 ± 4.5<.0001
IGF-I level, mean ± SD, ng/mL498.9 ± 210.1a612.2 ± 168.9692.1 ± 208.9.02
Age at menarche, mean ± SD, y12.9 ± 1.512.1 ± 0.812.2 ± 1.0.09
Daily calcium intake, mean ± SD, mg1838 ± 995a,b839 ± 432893 ± 326.0002
Daily vitamin D intake, mean ± SD, μg7.94 ± 5.66a,b3.82 ± 2.694.40 ± 2.49.01
Fractures, %23.85.316.7NS
  • NS indicates not significant.

  • a P < .05, compared with control subjects (Tukey-Kramer test to adjust for multiple comparisons).

  • b P < .05, compared with athletes with eumenorrhea.