TABLE 4.

BMD and BMC between racial/ethnic groups¹

	African American (n = 80)	Hispanic (n = 129)	Caucasian (n = 92)	P
BMD, g/cm2
Spine
At 12–20 wk of gestation	1.13 ± 0.12H,C	0.99 ± 0.10C	1.08 ± 0.10	<0.001
At 0–14 wk postpartum	1.10 ± 0.14H	0.95 ± 0.10C	1.06 ± 0.10	<0.001
Change	−0.04 ± 0.04C	−0.04 ± 0.03C	−0.02 ± 0.04	0.006
Femoral neck
At 12–20 wk of gestation	0.96 ± 0.15H,C	0.87 ± 0.11	0.87 ± 0.11	<0.001
At 0–14 wk postpartum	0.94 ± 0.15H,C	0.86 ± 0.11	0.86 ± 0.11	<0.001
Change	−0.02 ± 0.04H	0.00 ± 0.04	−0.01 ± 0.03	0.056
BMC, g
Spine
At 12–20 wk of gestation	63.46 ± 10.17H	52.29 ± 7.67C	64.90 ± 8.80	<0.001
At 0–14 wk postpartum	60.57 ± 10.66H	49.2 ± 7.97C	62.2 ± 9.08	<0.001
Change	−2.89 ± 2.84	−3.1 ± 2.44	−2.7 ± 2.47	0.478
Femoral neck
At 12–20 wk of gestation	4.57 ± 0.80H,C	4.03 ± 0.69C	4.26 ± 0.59	<0.001
At 0–14 wk postpartum	4.5 ± 0.83H,C	4.02 ± 0.60	4.2 ± 0.55	<0.001
Change	−0.07 ± 0.25	−0.02 ± 0.37	−0.05 ± 0.29	0.453

¹All values are means ± SDs. Significant racial differences in BMD and BMC were shown at gestation and postpartum. The loss of spine BMD was also significantly different between groups. Overall comparisons between racial/ethnic groups were based on a Kruskal-Wallis rank-sum test. Superscript H or superscript C indicate a significant difference from Hispanics or Caucasians, respectively. Tukey’s test was used to adjust for multiple comparisons between racial/ethnic groups. BMC, bone mineral content; BMD, bone mineral density.