TABLE 1.

Baseline characteristics

Characteristic or statistic (n = 91)	Median value for the parameter	Range
Patient age (mo [IQR])	0.99 (0.23–11.19)	0.03–197.30
Age distribution (no. of patients [%])		NAc
0–7 days	25 (27.5)
8–29 days	19 (20.9)
30 days–1 yr	26 (28.6)
≥1 yr	21 (23.1)
No. (%) of preterm infantsa	43 (78.2)	NA
No. (%) of term infantsb	12 (21.8)	NA
Gestational age (weeks [IQR])b	29.00 (26.05–33.00)	22.10–42.29
Gender female/male		NA
No. (%) female patients	31 (34.1)
No. (%) male patients	60 (65.9)
Weight (kg [IQR])	3.10 (1.44–8.28)	0.58–75.00
Serum creatinine level (mg/dl [IQR])	0.60 (0.40–0.85)	0.10–1.50
Race (no. of patients [%])		NA
Caucasian	37 (40.7)
African American	31 (34.1)
Asian	3 (3.3)
Hispanic	20 (22.0)

^aPreterm, gestational age of <36 weeks.

^bFor patients of postnatal age of over 63 days, information about gestational age was not available.

^cNA, not applicable.