Clinical and Sociodemographic Factors Associated With Human Donor Milk Supplementation in Term Newborns.

OBJECTIVES

To identify differences between healthy term newborns supplemented with human donor milk (HDM) and those supplemented with infant formula. We hypothesized that sociodemographic and clinical distinctions exist between newborns receiving different milk types.

METHODS

This retrospective study included term newborns admitted to the postpartum unit between March 2017 and April 2019 with ≥1 supplemental feeding with HDM or formula for indications other than hypoglycemia. Maternal and newborn data were abstracted from the electronic medical record.

RESULTS

Five hundred eighty-four dyads met inclusion criteria. More newborns received supplementation with formula than with HDM (57.7% vs 42.3%; P < .001). Infants undergoing phototherapy who required supplementation were more likely to receive HDM (P < .001). Newborns born to white and non-Hispanic mothers were more likely to receive HDM than those born to African American (adjusted odds ratio [aOR] 5.6; P = .007), Hispanic (aOR 3.0; P = .001), or Asian American mothers (aOR 2.7; P = .007). Newborns born to primiparous women (aOR 1.6; P = .03), those born to women with private insurance (aOR 3.7; P < .001), and those born via cesarean delivery (aOR 2.0; P < .001) were more likely to receive HDM. HDM use was more likely in primary English- or Spanish-speaking households (aOR 8.5; P = .009). Newborns receiving their first supplemental feeding during the day (aOR 1.9; P = .001) were more likely to be supplemented with HDM.

CONCLUSIONS

There are clinical and sociodemographic differences between healthy term newborns supplemented with HDM and formula. These findings reveal that there are disparities in current supplementation practices for healthy newborns.