Table 2.

Measurement of PRISM III Laboratory Variables. The number of patients with a measurement of any PRISM III laboratory variable and the number with a measurement of each of the PRISM III variables are shown as a percent of the baseline period (0 hour to 12 hours) for selected candidate intervals. The absolute number of patients with measurements is shown in the baseline period.

Time Interval (hours)	Any PRISM III Laboratory Measurement	WBC	Acidosis	pH	PCO2	Total CO2	PaO2	Platelets	Glucose	Potassium	PT/PTT	BUN	Creatinine
−2 to 12	106.5	117.6	107.4	111.3	111.3	110.9	109.1	117.6	110.9	110.2	116.1	111	110.8
0 to 12
(Baseline)	100 (n = 294)	100 (n = 222)	100 (n = 282)	100 (n = 194)	100 (n = 194)	100 (n = 247)	100 (132)	100 (n = 221)	100 (n = 247)	100 (n = 254)	100 (n = 137)	100 (n = 246)	100 (n = 249)
0 to 8	91.8	86.0	90.1	97.4	97.4	83.4	96.2	86.0	84.6	83.9	91.2	82.9	83.1
0 to 6	88.4	81.1	86.5	94.8	94.8	77.3	90.9	81.0	77.3	77.2	87.6	76	76.3
0 to 4	84.4	76.6	83.0	91.2	91.2	71.3	84.1	76.5	68.8	71.3	77.4	69.9	70.3
0 to 2	72.4	63.5	70.6	78.4	78.4	56.7	70.5	63.3	56.7	57.5	68.6	56.5	56.6
−1 to 4	89.5	89.2	86.9	95.4	95.4	81.0	90.2	89.1	77.3	79.9	89.1	78.9	79.1
−2 to 4	96.6	101.8	95.0	105.7	105.7	89.9	95.5	101.8	86.2	89.4	98.5	87.4	87.6