. Author manuscript; available in PMC: 2023 Feb 2.

Published in final edited form as: Pediatr Res. 2022 Apr 7;93(1):154–159. doi: 10.1038/s41390-022-02043-6

Table 1:

Descriptive statistics for infants in the study

	All subjects (N=4527)
Birthweight Mean (range)^a	1494g (340–3960g)
Gestational age Mean (range)^b	30 weeks (22–33weeks)
Sex	Male: 2440 (53.9%) Female: 2087 (46.1%)
Birth center Number (%)	Inborn: 3508 (77.5%) Outborn: 1019 (22.5%)
Birth year Mean (range)	2011 (2005–2017)
Maternal race/ethnicity^c	White, non-Hispanic African-American Hispanic Other Unknown	2713 (60.0%) 915 (20.2%) 382 (8.4%) 155 (3.4%) 362 (8.0%)

25–75^th percentile: 1080–1870g

weeks = weeks estimated post-menstrual age at birth

maternal race/ethnicity as self-reported