Table 4.

Clinical decision rule Odds Ratios (continuous variable PCT)

Rule	Risk	OR of severe infection compared to ‘low’ risk group [95% CI]
Department	Low	1.0 [Reference value]
	Intermediate	0.239 [0.0116, 6.9]
	High	0.240 [0.0152, 6.4]
	logPCT	23.3 [4.0, 265]
Ammann	Low	1.0 [Reference value]
	High	1.72 [0.176, 38.1]
	logPCT	15.5 [2.78, 166]
Rackoff	Low	1.0 [Reference value]
	Intermediate	0.86 [0.083, 16.9]
	High	0.185 [0.00287, 7.1]
	logPCT	27.1 [4.2, 398]
SPOG	Low	1.0 [Reference value]
	High	2.86 [0.45, 23.9]
	logPCT	17.1 [3.52, 160]
Alexander	Low	1.0 [Reference value]
	High	0.49 [0.058, 3.39]
	logPCT	22.9 [3.05, 258]
PINDA	Low	1.0 [Reference value]
	High	1.60 [0.205, 11.2]
	logPCT	15.4 [2.58, 160]