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Journal of Human Lactation, Vol. 23, No. 1,
44-51 (2007)
DOI: 10.1177/0890334406297283
Low Prepregnant Body Mass Index and Breastfeeding Practices
Marcello Giovannini, MD
Department of Pediatrics, San Paolo Hospital, University of Milan
Giovanni Radaelli, PhD
University of Milan, giovanni.radaelli{at}unimi.it
Enrica Riva, MD
Department of Neonatal Medicine, San Paolo Hospital, Neonatology at the University of Milan
Giuseppe Banderali, MD
Department of Pediatrics, Pediatric Day-Hospital, San Paolo Hospital, Milan
The relationship of low prepregnant body mass index with breastfeeding was investigated in 1272 women who delivered a term infant with birthweight 2500 g at the San Paolo Hospital in Milan, Northern Italy. Underweight was defined using the Institute of Medicines cutoff of 19.8 kg/m2. Women were interviewed via telephone through 12 months postdelivery about breastfeeding practices. Education level (high versus low, odds ratio [OR], 1.41), primiparity (OR, 1.35), vaginal delivery (OR, 0.74), and birthweight of the infant (normal versus high, OR, 1.89) were associated with low, as opposed to normal, pre-pregnant body mass index. After adjustment for these confounders, no difference was found between underweight and normal weight women for initiation or duration of breastfeeding (mean adjusted difference, 0.4; 95% confidence interval [95% CI], -0.1 to 0.9 months) or exclusive breastfeeding (0.1 [95% CI, -0.1 to 0.3] months). Underweight mothers of healthy term infants may not be at increased risk for not initiating or shorter breastfeeding.
Key Words: breastfeeding exclusive breastfeeding prepregnant body mass index
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