. Author manuscript; available in PMC: 2013 Jun 1.

Published in final edited form as: Ther Drug Monit. 2012 Jun;34(3):312–319. doi: 10.1097/FTD.0b013e3182587665

TABLE 1.

Clinical Data by Gestational Age Group

Characteristic	Gestational Age at Birth (Weeks)
Characteristic	<26	26–29	30–32
N	29	20	7
Gestational age, weeks	24 (22, 25)	27 (26, 29)	31 (28, 32)
Postnatal age, days	17 (1, 77)	15 (1, 75)	24 (3, 65)
Postmenstrual age, weeks	27 (23, 35)	30 (27, 38)	35 (31, 40)
Weight, g	709 (400, 1400)	1023 (555, 2580)	1610 (1357, 1890)
Female sex	14 (48)	5 (25)	6 (86)
Race
White	15 (52)	10 (50)	4 (57)
Black	12 (41)	9 (45)	2 (29)
Other	2 (7)	1 (5)	1 (14)
Hispanic	2 (7)	1 (5)	2 (29)
Serum creatinine (mg/dL)	1 (0.3, 2.4)	0.8 (0.2,2)	0.5 (0.2,0.9)
Dose (mg/kg)	80 (43,147)	87 (44,116)	100 (39,110)
Dosing frequency (h)	8 (6,14)	8 (6,13)	8 (6,16)

Data are median (range) for continuous data and n (%) for categorical data.