Table II.
Demographic, dietetic and bone characteristics
| Parameter | Breast-feeders (n = 295) | Non-breast-feeders (mean ± SD) (n = 138) | Significance Value of p | ||
|---|---|---|---|---|---|
| Mean ± SD | Range | Mean ± SD | Range | ||
| Age [years] | 44.08 ±4.75 | 30–53 | 39.92 ±8.30 | 18–53 | < 0.0001 |
| Menarche age [years] | 12.64 ±1.38 | 8–18 | 12.57 ±1.35 | 9–16 | NS |
| Weight [kg] | 64.98 ±9.36 | 46.4–102.20 | 63.92 ±10.76 | 41.7–106.90 | NS |
| Height [m] | 1.59 ±0.5 | 1.43–1.75 | 1.60 ±0.63 | 1.45–1.77 | < 0.01 |
| BMI [kg/m2] | 25.66 ±3.65 | 18.82–38.70 | 24.71 ±4.01 | 18.04–42.02 | < 0.05 |
| Parity (range) | 1–4 | 0–3 | < 0.0001 | ||
| Gravidity (range) | 1–7 | 0–5 | < 0.0001 | ||
| Ca intake [mg/day] | 1041.27 ±524.25 | 175–3056 | 1107.96 ±466.35 | 221–2648 | NS |
| Protein [g/day] | 89.09 ±29.24 | 38.84–193.85 | 85.96 ±23.03 | 31.31–136.77 | NS |
| Ca/Prot [mg/day] | 11.72 ±4.81 | 3.19–33.15 | 12.96 ±4.76 | 3.66–26.34 | NS |
| P [mg/day] | 1366.65 ±514.19 | 359–3283 | 1406 ±460.84 | 436–2780 | NS |
| Ca/P | 0.73 ±0.16 | 0.28–1.07 | 0.77 ±0.16 | 0.29–1.18 | NS |
| kcal/day | 2222.60 ±609.19 | 610.20–4006.50 | 2215.10 ±584.35 | 928.80–4693.00 | NS |
| aBMD (FN) [g/cm2] | 0.909 ±0.11 | 0.681–1.287 | 0.904 ±0.114 | 0.681–1.185 | NS |
| aBMD (TR) [g/cm2] | 0.701 ±0.10 | 0.462–1.084 | 0.69 ±0.106 | 0.479–1.046 | NS |
| aBMD (WT) [g/cm2] | 0.697 ±0.117 | 0.456–1.175 | 0.713 ±0.119 | 0.485–1.016 | NS |
| aBMD (L2–L4) [g/cm2] | 1.10 ±0.10 | 0.90–1.49 | 1.08 ±0.11 | 0.85–1.49 | < 0.05 |
| Ad-SoS [m/s] | 2122.801 ±51.026 | 1973–2258 | 2122.321 ±51.216 | 1980–2275 | NS |
| Trabecular vBMD [mg/mm3] | 182.536 ±35.692 | 82.8–313.1 | 182.901 ±38.306 | 84.900–351.400 | NS |
| Total vBMD [mg/mm3] | 360.99 ±48.11 | 217.70–523.10 | 356.37 ±52.27 | 237.90–560.10 | < 0.05 |
| Cortical vBMD [mg/mm3] | 508.46 ±70.98 | 299.20–738.80 | 493.95 ±77.63 | 310.10–766.50 | < 0.05 |
| T-score | –0.395 ±0.769 | –0.488 ±0.883 | 0.2698 | ||
| Z-score | –0.222 ±0.786 | –0.339 ±0.900 | 0.1739 | ||
Intergroup comparisons were made using the Mann-Whitney U-test. SD – standard deviation, NS – not significant