Table 1.
Baseline Characteristics of Chinese-American Subjects
| Boys (n = 15), Mean ± SD | Girls (n = 14), Mean ± SD | |||
|---|---|---|---|---|
| Min | Max | Min | Max | |
| Age (years) | 14.0 ± 1.0 | 12.6–15.5 | 13.3 ± 1.3 | 11.2–15.7 |
| Height (cm) | 162.2 ± 10.2 | 145.7–177.1 | 156.5 ± 7.1 | 138.9–165.1 |
| Weight (kg) | 55.4 ± 14.6 | 31.2–82.7 | 47.1 ± 8.6 | 36.2–62.8 |
| BMI (kg/m2) | 20.8 ± 4.1 | 14.7–29.4 | 19.2 ± 2.5 | 15.9–24.7 |
| Tanner score | 3.5 ± 1.6 | 1.0–5.0 | 3.2 ± 1.4 | 1.0–5.0 |
| PMA (months) | 13.9 ± 21.3 | 0.0–71.0 | ||
| Total-body BMC (g) | 2100 ± 534 | 1150–2902 | 1877 ± 337 | 1347–2546 |
| Total-body BMD (g/cm2) | 1.04 ± 0.10 | 0.83–1.18 | 1.02 ± 0.05 | 0.95–1.11 |
| Habitual calcium intake (mg/day) | 666 ± 349 | 78–1305 | 648 ± 321 | 160–1155 |
| SHBG (nmol/L) | 39.8 ± 27.7 | 10.9–119.4 | 52.6 ± 30.0 | 8.0–108.1 |
| Testosterone (ng/mL) | 3.7 ± 1.9 | 1.1–6.5 | ||
| E1 (estrone) (pg/mL) | 50.4 ± 26.1 | 12.1–114.3 | ||
| E2 (estradiol) (pg/mL) | 35.1 ± 16.2 | 3.2–62.7 | ||
| 1,25-Dihydroxyvitamin D (pg/mL) | 74.4 ± 30.8 | 39.4–156.1 | 59.9 ± 10.5 | 41.2–72.9 |
| 25-Hydroxyvitamin D (ng/mL) | 22.2 ± 5.7 | 13.8–36.2 | 19.1 ± 5.9 | 13.2–36.2 |
| IGF-1 (ng/mL) | 478.7 ± 117.1 | 320.1–703.8 | 476.6 ± 110.2 | 119.9–611.4 |
| IGFBP3 (ng/mL) | 5743 ± 730 | 4395–6665 | 6134 ± 1165 | 3841–8058 |
| Serum PTH (pg/mL)* | 27.6 ± 8.9 | 12.5–42.4 | 41.2 ± 18.7 | 14.6–81.8 |
| Serum osteocalcin (ng/mL) | 27.7 ± 5.9 | 18.3–38.1 | 22.8 ± 10.4 | 4.6–41.9 |
| Serum BAP (ng/mL)* | 80.3 ± 22.1 | 34.6–112.2 | 56.6 ± 28.9 | 16.8–110.7 |
| Total alkaline phosphatase (U/L)* | 254.9 ± 78.2 | 102.0–373.0 | 181.1 ± 94.6 | 61.0–385.0 |
| Serum NTX (nmol BCE)* | 116.9 ± 45.4 | 35.0–199.4 | 69.1 ± 52.9 | 14.7–232.7 |
| Serum calcium (mg/dL)* | 9.5 ± 0.2 | 9.1–9.7 | 9.6 ± 0.3 | 9.2–10.2 |
*
Differences p < .05,