Characteristics Assessed in 124 Healthy Boys at a Mean Age of 7.4, 15.2, and 22.6 Years
| Characteristic | 7.4 ± 0.4 | 15.2 ± 0.4 | 22.6 ± 0.8 | Δ 7.4 to 15.2 | Δ 15.2 to 22.6 | Δ 7.4 to 22.6 |
| Standing height, cm | 125.7 ± 5.9 | 171.8 ± 8.4 | 178.7 ± 6.2 | 46.3 ± 4.7 | 6.9 ± 5.5 | 53.2 ± 4.3 |
| Body weight, kg | 25.3 ± 4.6 | 59.3 ± 11.1 | 73.4 ± 12.8 | 34.3 ± 8.2 | 14.1 ± 8.9 | 48.4 ± 10.3 |
| BMI, kg/m2 | 15.9 ± 1.9 | 20.0 ± 2.7 | 23.0 ± 3.6 | 4.2 ± 2.0 | 3.0 ± 2.4 | 7.2 ± 3.0 |
| Calcium intake, mg ⋅ d−1 | 752 ± 263 | 1031 ± 569 | 949 ± 501 | 276 ± 531 | −85 ± 513 | 194 ± 515 |
| Protein intake, g ⋅ d−1 | 47.3 ± 11.6 | 63.7 ± 24.6 | 75.5 ± 27.0 | 16.6 ± 22.5 | 11.7 ± 30.7 | 28.5 ± 27.7 |
| Total PA, kcal ⋅ d−1 | 242 ± 94 | 722 ± 378 | 738 ± 530 | 487 ± 359 | 15 ± 525 | 498 ± 516 |
| FN BMC, mg | 2052 ± 337 | 4600 ± 803 | 5296 ± 839 | 2562 ± 662 | 680 ± 563 | 3250 ± 707 |
| FN area, cm2 | 3.00 ± 0.32 | 5.27 ± 0.43 | 5.65 ± 0.36 | 2.27 ± 0.37 | 0.38 ± 0.32 | 2.65 ± 0.35 |
| FN width, cm | 1.98 ± 0.21 | 3.49 ± 0.28 | 3.73 ± 0.24 | 1.50 ± 0.25 | 0.25 ± 0.21 | 1.75 ± 0.23 |
| FN aBMD, mg/cm2 | 675 ± 72 | 872 ± 122 | 938 ± 135a | 192 ± 92 | 63 ± 83 | 256 ± 108 |
| Characteristic | 7.4 ± 0.4 | 15.2 ± 0.4 | 22.6 ± 0.8 | Δ 7.4 to 15.2 | Δ 15.2 to 22.6 | Δ 7.4 to 22.6 |
| Standing height, cm | 125.7 ± 5.9 | 171.8 ± 8.4 | 178.7 ± 6.2 | 46.3 ± 4.7 | 6.9 ± 5.5 | 53.2 ± 4.3 |
| Body weight, kg | 25.3 ± 4.6 | 59.3 ± 11.1 | 73.4 ± 12.8 | 34.3 ± 8.2 | 14.1 ± 8.9 | 48.4 ± 10.3 |
| BMI, kg/m2 | 15.9 ± 1.9 | 20.0 ± 2.7 | 23.0 ± 3.6 | 4.2 ± 2.0 | 3.0 ± 2.4 | 7.2 ± 3.0 |
| Calcium intake, mg ⋅ d−1 | 752 ± 263 | 1031 ± 569 | 949 ± 501 | 276 ± 531 | −85 ± 513 | 194 ± 515 |
| Protein intake, g ⋅ d−1 | 47.3 ± 11.6 | 63.7 ± 24.6 | 75.5 ± 27.0 | 16.6 ± 22.5 | 11.7 ± 30.7 | 28.5 ± 27.7 |
| Total PA, kcal ⋅ d−1 | 242 ± 94 | 722 ± 378 | 738 ± 530 | 487 ± 359 | 15 ± 525 | 498 ± 516 |
| FN BMC, mg | 2052 ± 337 | 4600 ± 803 | 5296 ± 839 | 2562 ± 662 | 680 ± 563 | 3250 ± 707 |
| FN area, cm2 | 3.00 ± 0.32 | 5.27 ± 0.43 | 5.65 ± 0.36 | 2.27 ± 0.37 | 0.38 ± 0.32 | 2.65 ± 0.35 |
| FN width, cm | 1.98 ± 0.21 | 3.49 ± 0.28 | 3.73 ± 0.24 | 1.50 ± 0.25 | 0.25 ± 0.21 | 1.75 ± 0.23 |
| FN aBMD, mg/cm2 | 675 ± 72 | 872 ± 122 | 938 ± 135a | 192 ± 92 | 63 ± 83 | 256 ± 108 |
All values are means ± SDs.
aBMD, areal bone mineral density; BMC, bone mineral content; BMI, body mass index; FN, Femoral neck variables assessed by dual-energy X-ray absorptiometry; PA, physical activity.
a Corresponds to a T-score = 0.06 ± 0.99, which is not significantly different from that used as for the clinical diagnosis of osteoporosis in the dual-energy X-ray absorptiometry unit of the University Hospitals of Geneva.
Characteristics Assessed in 124 Healthy Boys at a Mean Age of 7.4, 15.2, and 22.6 Years
| Characteristic | 7.4 ± 0.4 | 15.2 ± 0.4 | 22.6 ± 0.8 | Δ 7.4 to 15.2 | Δ 15.2 to 22.6 | Δ 7.4 to 22.6 |
| Standing height, cm | 125.7 ± 5.9 | 171.8 ± 8.4 | 178.7 ± 6.2 | 46.3 ± 4.7 | 6.9 ± 5.5 | 53.2 ± 4.3 |
| Body weight, kg | 25.3 ± 4.6 | 59.3 ± 11.1 | 73.4 ± 12.8 | 34.3 ± 8.2 | 14.1 ± 8.9 | 48.4 ± 10.3 |
| BMI, kg/m2 | 15.9 ± 1.9 | 20.0 ± 2.7 | 23.0 ± 3.6 | 4.2 ± 2.0 | 3.0 ± 2.4 | 7.2 ± 3.0 |
| Calcium intake, mg ⋅ d−1 | 752 ± 263 | 1031 ± 569 | 949 ± 501 | 276 ± 531 | −85 ± 513 | 194 ± 515 |
| Protein intake, g ⋅ d−1 | 47.3 ± 11.6 | 63.7 ± 24.6 | 75.5 ± 27.0 | 16.6 ± 22.5 | 11.7 ± 30.7 | 28.5 ± 27.7 |
| Total PA, kcal ⋅ d−1 | 242 ± 94 | 722 ± 378 | 738 ± 530 | 487 ± 359 | 15 ± 525 | 498 ± 516 |
| FN BMC, mg | 2052 ± 337 | 4600 ± 803 | 5296 ± 839 | 2562 ± 662 | 680 ± 563 | 3250 ± 707 |
| FN area, cm2 | 3.00 ± 0.32 | 5.27 ± 0.43 | 5.65 ± 0.36 | 2.27 ± 0.37 | 0.38 ± 0.32 | 2.65 ± 0.35 |
| FN width, cm | 1.98 ± 0.21 | 3.49 ± 0.28 | 3.73 ± 0.24 | 1.50 ± 0.25 | 0.25 ± 0.21 | 1.75 ± 0.23 |
| FN aBMD, mg/cm2 | 675 ± 72 | 872 ± 122 | 938 ± 135a | 192 ± 92 | 63 ± 83 | 256 ± 108 |
| Characteristic | 7.4 ± 0.4 | 15.2 ± 0.4 | 22.6 ± 0.8 | Δ 7.4 to 15.2 | Δ 15.2 to 22.6 | Δ 7.4 to 22.6 |
| Standing height, cm | 125.7 ± 5.9 | 171.8 ± 8.4 | 178.7 ± 6.2 | 46.3 ± 4.7 | 6.9 ± 5.5 | 53.2 ± 4.3 |
| Body weight, kg | 25.3 ± 4.6 | 59.3 ± 11.1 | 73.4 ± 12.8 | 34.3 ± 8.2 | 14.1 ± 8.9 | 48.4 ± 10.3 |
| BMI, kg/m2 | 15.9 ± 1.9 | 20.0 ± 2.7 | 23.0 ± 3.6 | 4.2 ± 2.0 | 3.0 ± 2.4 | 7.2 ± 3.0 |
| Calcium intake, mg ⋅ d−1 | 752 ± 263 | 1031 ± 569 | 949 ± 501 | 276 ± 531 | −85 ± 513 | 194 ± 515 |
| Protein intake, g ⋅ d−1 | 47.3 ± 11.6 | 63.7 ± 24.6 | 75.5 ± 27.0 | 16.6 ± 22.5 | 11.7 ± 30.7 | 28.5 ± 27.7 |
| Total PA, kcal ⋅ d−1 | 242 ± 94 | 722 ± 378 | 738 ± 530 | 487 ± 359 | 15 ± 525 | 498 ± 516 |
| FN BMC, mg | 2052 ± 337 | 4600 ± 803 | 5296 ± 839 | 2562 ± 662 | 680 ± 563 | 3250 ± 707 |
| FN area, cm2 | 3.00 ± 0.32 | 5.27 ± 0.43 | 5.65 ± 0.36 | 2.27 ± 0.37 | 0.38 ± 0.32 | 2.65 ± 0.35 |
| FN width, cm | 1.98 ± 0.21 | 3.49 ± 0.28 | 3.73 ± 0.24 | 1.50 ± 0.25 | 0.25 ± 0.21 | 1.75 ± 0.23 |
| FN aBMD, mg/cm2 | 675 ± 72 | 872 ± 122 | 938 ± 135a | 192 ± 92 | 63 ± 83 | 256 ± 108 |
All values are means ± SDs.
aBMD, areal bone mineral density; BMC, bone mineral content; BMI, body mass index; FN, Femoral neck variables assessed by dual-energy X-ray absorptiometry; PA, physical activity.
a Corresponds to a T-score = 0.06 ± 0.99, which is not significantly different from that used as for the clinical diagnosis of osteoporosis in the dual-energy X-ray absorptiometry unit of the University Hospitals of Geneva.
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