Table 3.
Lumbar spine and femur bone densitometry assessed by Dual-energy X-ray absorptiometry (DXA) of Brazilian women living in Brazil by age tertiles (n = 79) 1.
| Bone Parameter | All | Age (Years) | p Value 2 | ||
|---|---|---|---|---|---|
| Tertile 1 ≤25 |
Tertile 2 26–30 |
Tertile 3 ≥31 |
|||
| Number (n) | 79 | 33 | 25 | 21 | |
| Weight (kg) | 63.21 ± 13.07 | 60.41 ± 12.58 | 64.30 ± 12.46 | 66.32 ± 14.20 | 0.239 |
| Height (m) | 1.62 ± 0.59 | 1.61 ± 0.05 | 1.64 ± 0.06 | 1.60 ± 0.06 | 0.157 |
| Serum 25(OH)D (nmol/L) | 75.00 ± 22.13 | 78.87 ± 27.23 | 74.68 ± 18.39 | 77.15 ± 17.61 | 0.868 |
| Plasma PTH (pmol/L) | 4.49 ±1.47 | 3.96 ± 1.25 a | 4.79 ± 1.61 | 4.99 ± 1.42 a | 0.021 |
| Serum calcium (mmol/L) | 2.28 ± 0.06 | 2.29 ± 0.07 | 2.29 ± 0.05 | 2.25 ± 0.07 | 0.26 |
| Lumbar Spine | |||||
| Number (n) | 79 | 33 | 25 | 21 | 0.537 |
| BMD (g/cm2) | 1.13 ± 0.11 | 1.12 ± 0.12 | 1.13 ± 0.11 | 1.15 ± 0.11 | |
| Femur | |||||
| Number (n) | 64 | 27 | 20 | 17 | 0.495 |
| BMD (g/cm2) | 0.98 ± 0.10 | 0.97 ± 0.10 | 0.97 ± 0.12 | 1.01 ± 0.11 | |
| Total BMC | |||||
| Number (n) | 79 | 33 | 25 | 21 | 0.204 |
| BMC (g) | 2304.87 ± 401.76 | 2304.87 ± 401.76 | 2459.92 ± 377.29 | 2460.95 ± 338.42 | |
| Z-score n (%) | |||||
| Lumbar Spine BMD | |||||
| Normal (>−2.0) | 79 (97.5%) | 31 (94%) | 25 (100%) | 21 (100%) | |
| Low bone mineral (≤−2.0) | 2 (2.5%) | 2 (6%) | 0 | 0 | |
| Z-score n (%) | |||||
| Femur BMD | |||||
| Normal (>−2.0) | 64 (100%) | 27 (100%) | 20 (100%) | 17 (100%) | |
| Low bone mineral (≤−2.0) | 0 | 0 | 0 | 0 | |
1 Values: mean ± SD or n (%); 2 Statistical analysis: one-way ANOVA with post-hoc Tukey’s test: values in the same row with the same superscript letters are significantly different (a p = 0.034).