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Subject:
From:
"Hoover, Janet (DSCH)" <[log in to unmask]>
Reply To:
Lactation Information and Discussion <[log in to unmask]>
Date:
Tue, 6 Jul 2004 08:13:34 -0700
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http://archpedi.ama-assn.org/cgi/content/abstract/158/7/650

Arch Pediatr Adolesc Med. 2004;158:650-656.

Lactation Among Adolescent Mothers and Subsequent Bone Mineral Density
Caroline J. Chantry, MD; Peggy Auinger, MS; Robert S. Byrd, MD, MPH


Arch Pediatr Adolesc Med. 2004;158:650-656.

Objective  To investigate the association of breastfeeding during
adolescence with bone mineral density (BMD) during young adulthood.

Methods  Secondary analysis of data from the National Health and Nutrition
Examination Survey III, a nationally representative cross-sectional survey
conducted from 1988 through 1994, was performed. The BMDs for 5 regions of
the proximal femur as measured by dual energy x-ray absorptiometry were
compared for 5 groups of women aged 20 to 25 years (n = 819); the groups
included those who had been: (1) adolescent mothers and had breastfed (n =
94), (2) adolescent mothers and had not breastfed (n = 151), (3) mothers who
first gave birth as adults and breastfed (n = 67), (4) mothers who first
gave birth as adults and had not breastfed (n = 89), and (5) nulliparous (n
= 418). SUDAAN software was used to account for the complex sampling design
of the National Health and Nutrition Examination Survey. Adjusted mean
differences in BMD were estimated using least-squares linear regression.

Results  During young adulthood, women who breastfed during adolescence had
higher adjusted BMDs, which was statistically significant in 4 of the 5
regions, than those who had not breastfed (total proximal femur area
difference, 0.049 gm/cm2 [95% confidence interval, 0.002-0.095]) and BMDs
equivalent to nulliparous women (total proximal femur area difference, 0.024
gm/cm2 [95% confidence interval, -0.023 to 0.071]). Adjusting also for
obstetric variables, women who breastfed during adolescence had higher BMDs
in all 5 regions compared with their peers who had not breastfed (total
proximal femur area difference, 0.053 gm/cm2 [95% confidence interval,
0.029-0.077]).

Conclusions  In this nationally representative sample, breastfeeding by
adolescent mothers was associated with greater BMD in the proximal femur
during young adulthood. Lactation was not found to be detrimental and may be
protective to the bone health of adolescent mothers.


From the Department of Pediatrics at the University of California Davis
Medical Center, Sacramento (Drs Chantry and Byrd); and the American Academy
of Pediatrics Center for Child Health Research and the Department of
Pediatrics at the University of Rochester School of Medicine and Dentistry,
Rochester, NY (Ms Auinger).

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