. Author manuscript; available in PMC: 2010 Oct 22.

Published in final edited form as: Med Decis Making. 2009 Jun 18;30(2):258–266. doi: 10.1177/0272989X09337791

Table 1.

Patient population and laboratory test results

	Training set	All infants
N	327	676
#HRC	36,309	71,254
BW (g)	1454 (973,2620)	1581 (974,2700)
<1500 g	166 (51%)	317 (47%)
GA (weeks)	31 (27, 36)	31 (27, 36)
Episodes of sepsis	88 (67 infants)	163 (120)
Laboratory test results
WBC	6723	13,014
I:T ratio	5616	10,887
glucose	24,592	48,312
platelet count	8275	16,144
pH, pCO₂	25,865	50,464
HCO₃	20,828	40,630

#HRC = number of 6-hour HRC records; BW = birth weight and GA is gestational age, and are given as median (25^th, 75^th percentiles); WBC = white blood cell count; I:T ratio = ratio of immature to total white blood cell forms.