Routine blood tests are associated with short term mortality and can improve emergency department triage: a cohort study of >12,000 patients

Table 2 Area under the receiver operation characteristics curve and Brier score for prediction of 30-day mortality in patients presenting in the emergency department

	Primary cohort (n = 5371)^a		Validation (n = 5738)^b
	AUC, % [95% CI]	Brier score, % [95% CI]	AUC, % [95% CI]	Brier score, % [95% CI]
Triage	63.4 [59.1;67.5]	4.90 [4.24;5.62]	62.8 [59.4;66.2]	3.85 [3.40;4.30]
Demographics^c	74.9 [71.4;78.2]	4.79 [4.17;5.49]	78.5 [76.1;81.0]	3.75 [3.34;4.17]
Blood tests^d	86.2 [83.1;89.3]	4.22 [3.62;4.82]	86.7 [84.4;88.9]	3.77 [3.44;4.11]
Blood tests^d + demographics^c	88.1 [85.7;90.5]	4.18 [3.60;4.79]	89.7 [88.1;91.4]	3.56 [3.24;3.88]
Blood tests^d + demographics^c + triage	88.6 [86.1;91.1]	4.11 [3.54;4.70]	90.8 [89.2;92.3]	3.40 [3.08;3.72]

^aHAPT-triage. ^bDEPT-triage. ^cAge and sex. ^dAlbumin, creatinine, c-reactive protein, haemoglobin, lactate dehydrogenase, leukocytes, potassium, sodium