Sex differences in height-for-age and TBLH aBMD-for-age curves in the SCCRIP pediatric cohort. Stature-for-age curves for female subjects (A) and male subjects (B) in the SCCRIP pediatric cohort, compared with reference data from healthy children and adolescents from the US National Center for Health Statistics. TBLH aBMD vs chronological age for female subjects (C) and male subjects (D) in the SCCRIP pediatric cohort. The TBLH aBMD reference curves were obtained from healthy African American control subjects, ages 6 to 18 years, enrolled in the BMDCS. The 50th percentile (green line) represents the mean value-for-age (z score = 0) of the reference populations.