The study investigated variations of bone mineral density during lactation and throughout …

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Biology Articles » Reproductive Biology » Bone Mineral Changes During and After Lactation » Tables

Tables

- Bone Mineral Changes During and After Lactation

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Table 1. Demographic Characteristics

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Table 2. Bone Mineral Density Percent Changes in the Spine* and Radius

Calcium status and test location 3 mo 6 mo 7 mo 12 mo 18 mo Lactating without calcium supplementation     Spine -3.7 ± 0.3 -4.4 ± 0.4 -3.4 ± 0.3 +0.4 ± 0.3 +1.8 ± 0.4     Radius -1.7 ± 0.2 -2.2 ± 0.4 -1.6 ± 0.3 +0.5 ± 0.3 +1.3 ± 0.4 Lactating with calcium supplementation     Spine -3.4 ± 0.4 -4.0 ± 0.3 -2.9 ± 0.4 +0.8 ± 0.3 +2.0 ± 0.4     Radius -1.4 ± 0.3 -2.0 ± 0.3 -1.3 ± 0.4 +0.3 ± 0.3 +1.3 ± 0.4 Nonlactating     Spine +0.8 ± 0.4 +1.4 ± 0.3   +2.1 ± 0.3 +1.9 ± 0.4     Radius +0.4 ± 0.2 +0.9 ± 0.3   +1.1 ± 0.4 +1.1 ± 0.3 Data are presented as mean ± standard deviation. * Spine mineral density: Model r2 = 0.66, model P = .001; study group P = .001 (lactating with calcium versus lactating without calcium P = .162; nonlactating versus lactating without calcium P = .001; lactating with calcium versus nonlactating P = .001); time P = .001 (Bonferroni correction applied). Radius mineral density: Model r2 = 0.59, model P = .001; study group P = .001 (lactating with calcium versus lactating without calcium P = .162; nonlactating versus lactating without calcium P = .001; lactating with calcium versus nonlactating P = .001); time P = .001 (Bonferroni correction applied).

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Table 3. Bone Mineral Density Percent Changes in Lactating Women According to Return of Menstruation

3 mo               Spine Radius Mo of amenorrhea   6 mo 7 mo 12 mo 18 mo Lactating without calcium supplementation -3.7 ± 0.4 -1.7 ± 0.4   Spine -3.0 ± 0.3 -2.0 ± 0.4 +0.8 ± 0.3 +1.9 ± 0.4 (n = 135) (n = 135) (n = 135) 5   (n = 77) (n = 77) (n = 77) (n = 65)         Radius -1.3 ± 0.3 -0.6 ± 0.4 +0.7 ± 0.3 +1.5 ± 0.4           (n = 77) (n = 77) (n = 77) (n = 65)         Spine -5.8 ± 0.4 -4.8 ± 0.3 -0.4 ± 0.4 +1.7 ± 0.3       >5   (n = 58) (n = 58) (n = 58) (n = 48)         Radius -3.1 ± 0.4 -2.6 ± 0.3 -0.6 ± 0.4 +1.1 ± 0.3           (n = 58) (n = 58) (n = 58) (n = 48) Lactating with calcium supplementation -3.4 ± 0.3 - 1.4 ± 0.3   Spine -2.6 ± 0.4 -1.8 ± 0.3 -1.0 ± 0.3 +2.2 ± 0.4 (n = 139) (n = 139) (n = 139) 5   (n = 80) (n = 80) (n = 80) (n = 70)         Radius -1.0 ± 0.4 -0.2 ± 0.3 +0.8 ± 0.3 +1.1 ± 0.4           (n = 80) (n = 80) (n = 80) (n = 70)         Spine -5.4 ± 0.3 -4.1 ± 0.4 -0.2 ± 0.3 +1.8 ± 0.3       >5   (n = 59) (n = 59) (n = 59) (n = 51)         Radius -3.0 ± 0.3 -2.4 ± 0.4 -0.2 ± 0.3 +1.2 ± 0.3           (n = 59) (n = 59) (n = 59) (n = 51) Values are means ± standard deviation. Spine mineral density: Model r2 = 0.80, model P = .001; calcium supplementation P = .252; menses resumption P = .001; time P = .001, qualitative interaction present. Radius mineral density: Model r2 = 0.70, model P = .001; calcium supplementation P = .001; menses resumption P = .001; time P = .001, no interaction retained. Subgroups pairwise comparison in text.

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Source: Obstetrics & Gynecology 1999;94:52-56.