Table 2.

Characteristics of critical illness and ICU course among children born at term or later^*

	0 to 4 days (N=147)	5 to 29 days (N=65)	30 days to 0.9 years (N=63)	1.0 to 3.9 years (N=76)	4.0 to 10.9 years (N=30)	P value
PRISM III score	3 (0, 4)	0 (0, 3)	0 (0, 2)	0 (0, 3)	0 (0, 3)	<.001
	(0–30)	(0–10)	(0–12)	(0–19)	(0–11)
Initial PELOD score	10 (10, 11)	10 (10, 10)	2 (0, 10)	1 (0, 10)	0.5 (0, 10)	<.001
	(0–41)	(0–20)	(0–31)	(0–21)	(0–20)
Maximum PELOD score	10 (10, 11)	10 (10, 10)	10 (0, 10)	1 (0, 10)	1.5 (0, 10)	<.001
	(0–42)	(0–21)	(0–31)	(0–21)	(0–32)
Invasive mechanical ventilation	54 (37%)	7 (11%)	15 (24%)	15 (20%)	4 (13%)	<.001
Duration mechanical ventilation (d, n=96)	2.6 (0.8, 5.9)	0.9 (0.9, 1.2)	0.8 (0.7, 2.8)	0.5 (0.3, 0.7)	1.8 (0.5, 63.5)	0.043
	(0.0–94.6)	(0.8–20.3)	(0.2–7.7)	(0.1–6.6)	(0.0–124.4)
Noninvasive mechanical ventilation	26 (18%)	2 (3%)	7 (11%)	2 (3%)	2 (7%)	0.001
Sedatives/Narcotics	51 (35%)	11 (17%)	33 (52%)	35 (46%)	13 (43%)	<.001
Vasopressors/Inotropes	25 (17%)	1 (2%)	5 (8%)	5 (7%)	1 (3%)	0.003
Total ICU length of stay (d)	4.2 (1.6, 9.0)	1.7 (1.0, 2.7)	0.9 (0.6, 2.8)	0.8 (0.6, 1.0)	0.9 (0.8, 2.0)	<.001
	(0.1–119.9)	(0.3–40.1)	(0.1–12.7)	(0.2–8.6)	(0.3–215.2)
Hospital length of stay (d)	4.5 (1.8, 9.7)	2.0 (1.3, 3.3)	2.8 (1.3, 5.2)	1.3 (1.0, 3.9)	2.7 (1.2, 6.8)	<.001
	(0.1–120.3)	(0.7–40.8)	(0.3–16.7)	(0.4–10.5)	(0.4–358.0)
Hospital mortality	4 (3%)	0 (0%)	0 (0%)	0 (0%)	0 (0%)	0.305

^*Values are n (%) for categorical variables and median (Q1, Q3) (min–max) for continuous variables. Due to rounding, percentages will not always sum to 100%.

^†Characteristics are compared across age groups using Fisher’s exact tests for categorical variables and the Kruskal-Wallis test for continuous variables

^§Acute kidney injury is defined as risk, injury, or failure.