Table 3.
Comparison of bone density variables among primiparous women to the multiparous (≥2 births) women; significance based on Levene's test for Equality of Variances.
| Primiparous (n = 27) |
Multiparous (n = 105) |
P value | |
|---|---|---|---|
| Maternal age mean ± SD (years) | 24.9 ± 3.5 | 31.1 ± 5.8 | 0.000 |
| Height mean ± SD | 162.5 ± 5.5 | 162.5 ± 6.6 | NS |
| Prepregnancy weight mean ± SD | 62.5 ± 15.2 | 64.4 ± 12.4 | NS |
| Prepregnancy BMI mean ± SD | 23.6 ± 5.1 | 24.3 ± 4.2 | NS |
| Current weight mean ± SD | 70.1 ± 14.9 | 72.3 ± 13.8 | NS |
| Current BMI mean ± SD | 26.5 ± 5.2 | 27.3 ± 4.5 | NS |
| Weight gain mean ± SD | 7.6 ± 5.2 | 8.6 ± 7.9 | NS |
| Gravidity mean ± SD | 1.07 ± 0.39 | 4.81 ± 2.5 | 0.000 |
| Parity mean ± SD | 1.0 ± 0 | 4.68 ± 2.4 | 0.000 |
| Months lactation mean ± SD | 0 | 34.1 ± 31.9 | 0.000 |
| Months pregnancy + lactation mean ± SD | 8.5 ± 0 | 73.4 ± 50.1 | 0.000 |
| FN-BMD mean ± SD | 0.806 ± 0.09 | 0.791 ± 0.11 | NS |
| FN T-scores mean ± SD | [−0.396] ± 0.79 | [−0.530] ± 1.0 | NS |
| FN Z-scores mean ± SD | [−0.381] ± 0.79 | [−0.408] ± 0.99 | NS |
| LS-BMD mean ± SD | 0.953 ± 0.11 | 0.898 ± 0.38 | NS |
| LS T-scores mean ± SD | [−0.841] ± 1.0 | [−0.715] ± 1.1 | NS |
| LS Z-scores mean ± SD | [−0.722] ± 0.93 | [−0.594] ± 1.1 | NS |
*SD: standard deviation; NS: not significant; BMI: body mass index; FN: femoral neck; BMD: bone mineral density; LS: lumbar spine.