Table 4.
Comparison variables among groups subdivided by parity (Group #1: primiparous; Group #2: 2–5 births; Group #3: ≥6 births); significance based on Levene's test for Equality of Variances.
| Group #1 (n = 27) |
Group #2 (n = 69) |
Group #3 (n = 36) |
P value | |
|---|---|---|---|---|
| Maternal age mean ± SD (range) in years | 24.7 ± 3.6 (20–32) |
28.8 ± 5.1 (20–42) |
35.8 ± 3.8 (28–46) |
0.003 |
| Height mean ± SD | 162.2 ± 5.5 | 162.3 ± 6.9 | 162.5 ± 6.3 | NS |
| Prepregnancy weight mean ± SD | 61.6 ± 15.3 | 62.3 ± 11.7 | 68.9 ± 13.0 | 0.025 |
| Prepregnancy BMI mean ± SD | 23.3 ± 5.2 | 23.6 ± 4.0 | 25.9 ± 4.0 | 0.021 |
| Current weight mean ± SD | 69.6 ± 15.0 | 70.0 ± 13.4 | 77.1 ± 13.5 | 0.013 |
| Current BMI mean ± SD | 26.4 ± 5.3 | 26.5 ± 4.5 | 28.9 ± 4.0 | 0.010 |
| Weight gain mean ± SD | 8.0 ± 5.1 | 8.6 ± 9.2 | 8.3 ± 4.8 | NS |
| Gravidity mean ± SD | 1.0 ± 0 | 3.3 ± 1.1 | 7.4 ± 1.8 | 0.000 |
| Parity mean ± SD | 1.0 ± 0.2 | 3.3 ± 1.2 | 7.4 ± 1.8 | 0.000 |
| Months lactation mean ± SD | 0 | 18.4 ± 17.4 | 64.0 ± 32.1 | 0.000 |
| Months pregnancy + lactation mean ± SD |
8.5 ± 0 | 45.5 ± 24.3 | 126.8 ± 42.9 | 0.000 |
| FN-BMD mean ± SD | 0.806 ± 0.09 | 0.796 ± 0.12 | 0.784 ± 0.09 | NS |
| FN T-scores mean ± SD | [−0.396] ± 0.79 | [−0.476] ± 1.1 | [−0.583] ± 0.80 | NS |
| FN Z-scores mean ± SD | [−0.381] ± 0.79 | [−0.399] ± 1.1 | [−0.378] ± 0.81 | NS |
| LS-BMD mean ± SD | 0.953 ± 0.11 | 0.940 ± 0.26 | 0.821 ± 0.54 | NS |
| LS T-scores mean ± SD | [−0.841] ± 1.0 | [−0.719] ± 1.1 | [−0.697] ± 0.95 | NS |
| LS Z-scores mean ± SD | [−0.722] ± 0.93 | [−0.646] ± 1.1 | [−0.489] ± 0.96 | NS |
SD: standard deviation; NS: not significant; BMI: body mass index; FN: femoral neck; BMD: bone mineral density; LS: lumbar spine.