Table 1

Characteristics of study patients

	All (n=506)	Non-SBI (n=464)	SBI (n=42)	p Value
Age, years^*	3 (2 to 4)	3 (2 to 4)	1 (1 to 5)	0.1927
Male gender	279 (55%)	254 (55%)	25 (60%)	0.6440
Febrile in ED^†	147 (29%)	125 (27%)	22 (52%)	0.0012
Lactate, mmol/l^*	2.0 (1.9 to 2.2)	2.0 (1.8 to 2.1)	3.4 (2.5 to 4.1)	<0.0001
WBC, 10⁹/l^*	11.1 (10.5 to 11.7)	10.8 (10.2 to 11.6)	14.4 (11.3 to 16.9)	0.0010
CRP, mg/l^*	9 (7 to 11)	8 (7 to 11)	26 (9 to 55)	0.0012

↵* Median (95% CI).
↵† Defined as temperature ≥38°C.
CRP, C-reactive protein; ED, emergency department; SBI, serious bacterial infection; WBC, white blood cell count.