Population

KP Karen M Puopolo
SM Sagori Mukhopadhyay
NH Nellie I Hansen
DF Dustin D Flannery
RG Rachel G Greenberg
PS Pablo J Sanchez
EB Edward F Bell
SD Sara B DeMauro
MW Myra H Wyckoff
EE Eric C Eichenwald
BS Barbara J Stoll
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Infants born between 1 September 1998 and 31 December 2016 with a gestational age (GA) of 22–28 weeks and who survived >12 hours were included in estimates of GBS disease incidence. Microbiology data were not available for infants who died <12 hours after birth. Risk of death or NDI was estimated in the subset of infants born between 1 September 1998 and 13 December 2014 with GA 22–26 weeks who had no major birth defects. Infants missing infection or birth defect information were excluded.

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