Bone Mineral Density in Gravida: Effect of Pregnancies and Breast-Feeding in Women of Differing Ages and Parity
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 ( = 27)
Group #2 ( = 69)
Group #3 ( = 36)
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 -scores mean ± SD
[−0.396] ± 0.79
[−0.476] ± 1.1
[−0.583] ± 0.80
NS
FN -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 -scores mean ± SD
[−0.841] ± 1.0
[−0.719] ± 1.1
[−0.697] ± 0.95
NS
LS -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.
