Table 1.

Characteristics of NCGS Subjects Who Have Attained Near-adult Height

Group 1Group 2
Males
(n = 480)
Females
(n = 194)
Males
(n = 153)
Females
(n = 105)
Age at NCGS enrollment (y)12.7  ± 2.211.2  ± 2.112.0  ± 2.4*10.9  ± 1.9
Bone age deficit (y)2.5  ± 1.52.5  ± 1.22.3  ± 1.52.5  ± 1.3
Height SDS at enrollment−2.6  ± 0.8−3.0  ± 0.9−2.6  ± 0.9−3.0  ± 0.9
Age at Tanner stage 2 (y)14.1  ± 1.512.6  ± 1.613.6  ± 1.6*12.3  ± 1.2
Bone age at Tanner stage 2 (y)11.9  ± 1.510.6  ± 1.511.8  ± 1.710.6  ± 1.7
Height SDS at Tanner stage 2−2.1  ± 0.9−2.4  ± 0.9−2.0  ± 0.9−2.5  ± 1.0
Age at near-adult height (y)17.3  ± 1.015.6  ± 1.517.5  ± 1.115.8  ± 1.2
Pubertal height gain (cm)22.4  ± 7.917.4  ± 6.324.7  ± 8.4*19.1  ± 6.6*
Percentage of adult height gained13.3  ± 4.611.3  ± 4.014.6  ± 4.9*12.3  ± 4.2*
Near-adult height SDS−1.3  ± 1.0−1.6  ± 0.9−1.3  ± 1.0−1.6  ± 1.0
Pubertal increase in height SDS0.8  ± 0.80.8  ± 0.80.7  ± 0.80.9  ± 0.9
Target height SDS−0.4  ± 0.8−0.5  ± 0.7−0.5  ± 0.8−0.5  ± 0.7
  • * P < .05 group 1 vs group 2.

  • Relative to the mean heights of normal 18-year-olds.