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Breastfeeding and newborn hospitalization rates: What should be done about it?

Roy Benaroch, MD
Conditions
February 18, 2019
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An August 2018 paper in Academic Pediatrics found an unsettling conclusion: Breastfed newborns have about double the risk of needing to be hospitalized in their first month of life, compared to babies who were formula-fed. The numbers are solid, and they jibe with the real-life experience of many pediatricians, including me. So what should we do about it?

The study itself looked at about 150,000 healthy, normal newborns born in Northern California hospitals from 2009 to 2013. The study authors were able to collect data on how these babies were fed in the few days following birth from hospital records (dividing them into groups of all-breast, all-formula, and a mixed group that did some of both). They were then able to track these babies over the first month of their lives to see which ones ended up hospitalized for any reason. Most of the hospitalizations were related to dehydration and jaundice, which are closely linked to inadequate feeding.

The good news is that relatively few of these babies ended up back in the hospital – whether bottle-fed, breastfed, or both, most babies did great. But babies who were breastfed were much more likely than formula-feeders to end up underfed and hospitalized. Among vaginal deliveries, the risk of rehospitalization was 2.1% for bottle-fed babies versus 4.3% for breastfed babies (the risk for mixed feeders was in between.) That’s about double the risk. Mathematically, the “number needed to harm” was 45. That is, for every 45 babies exclusively breastfed, one extra baby would end up in the hospital. Not good.

Among Caesarian births, the differential was less, with an increased risk of hospitalization of 2.1% (breast) versus 1.5% (formula). Both of these numbers are lower than the risk of rehospitalization for vaginal deliveries, probably because c-section babies already spend an extra day or two in the hospital. This provides more time for proper feeding to be established (whether breast, bottle, or both.)

Does this mean we should discourage breastfeeding? Of course not. Most breastfed babies do great, and there are some health advantages of breastfeeding. But we need to be honest with ourselves, and honest with moms who are trying to do the best thing for their babies. Nursing isn’t perfect. It’s not a perfect food (human breast milk is an inadequate source of vitamin D from birth, and an inadequate source of iron by 4 to 6 months of life), and it’s not a perfect method. There are pros and cons to both nursing and formula feeding, and parents (and babies) deserve an honest appraisal.

Nursing moms also need support. That includes “technical support” (i.e., “How to do it”) but also emotional and medical support – which should include time for rest and an honest evaluation of how both moms and babies are doing. There is a role for formula, both for moms who choose to use it and for situations where babies aren’t getting enough to eat. Families, pediatricians, nurses, and lactation specialists all need to work together, without guilt or finger-pointing, to help keep babies and moms healthy.

Roy Benaroch is a pediatrician who blogs at the Pediatric Insider. He is also the author of A Guide to Getting the Best Health Care for Your Child and the creator of The Great Courses’ Medical School for Everyone: Grand Rounds Cases.

Image credit: Shutterstock.com

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