. Author manuscript; available in PMC: 2016 May 1.

Published in final edited form as: Am J Perinatol. 2015 Jan 16;32(6):565–570. doi: 10.1055/s-0034-1543955

Table 1.

Demographics

	Infants exposed to rifampin (N=2500)
Gestational age, weeks
<26	888 (36%)
26–28	822 (33%)
29–32	450 (18%)
33–36	203 (8%)
≥37	137 (5%)

Birth weight, g
<1000	1531 (61%)
1000–1499	524 (21%)
1500–2499	252 (10%)
2500–3499	140 (6%)
≥3500	49 (2%)

Age at first rifampin exposure, days
<3	5 (0.2%)
3–6	8 (0.3%)
7–29	1634 (65%)
30–59	628 (25%)
60–120	225 (9%)

Race/ethnicity
White	1019 (42%)
African American	624 (26%)
Hispanic	683 (28%)
Other	95 (4%)

Male	1334 (53%)

Caesarean delivery	1771 (72%)

Mean (5^th, 95^th percentile) length of NICU stay, days	85 (20, 160)

Died	242 (11%)

Abbreviation: NICU, neonatal intensive care unit.