Table 1. Four common clinical prediction/diagnostic rules for critical illness.

SIRS		Points
	Temperature >38°C or <36°C	1
	Heart rate >90 bpm	1
	Respiratory rate >20 /min or PaCO2 <32mmHg/4.3kPa	1
	White blood cell count >12000/mm3 or <4000/mm3	1
	Score: 0–4 points, respiratory rate gives 0–1 points, positive score ≥2 points
qSOFA		Points
	Respiratory rate ≥22/min	1
	Altered mentation	1
	Systolic blood pressure ≤100mmHg	1
	Score: 0–3 points, respiratory rate gives 0–1 points, positive score ≥2 points
NEWS		Points
		3	2	1	0	1	2	3
	Respiratory rate (/min)	≤8		9–11	12–20		21–24	≥25
	Oxygen saturation (%)	≤91	92–93	94–95	≥96
	Supplemental oxygen		Yes		No
	Temperature (°C)	≤35.0		35.1–36.0	36.1–38.0	38.1–39.0	≥39.1
	Systolic blood pressure (mmHg)	≤90	91–100	101–110	111–219			≥220
	Heart rate (bpm)	≤40		41–50	51–90	91–110	111–130	≥131
	Level of consciousness				A			V, P, or U
	Score: 0–20 points, respiratory rate gives 0–3 points, warning trigger is a total score of 5 points, or a score of 3 on a single parameter
MEWS		Points
		3	2	1	0	1	2	3
	Systolic blood pressure (mmHg)	<70	71–80	81–100	101–199		≥200
	Heart rate (bpm)		<40	41–50	51–100	101–110	111–129	≥130
	Respiratory rate (/min)		<9		9–14	15–20	21–29	≥30
	Temperature (°C)		<35		35–38.4		≥38.5
	Level of consciousness				A	V	P	U
	Score: 0–14 points, respiratory rate gives 0–3 points, warning trigger is a total score of 4 points, or a score of 3 on a single parameter

Abbreviations: bpm, beats per minute; AVPU score: A = Alert, V = reacting to voice, P = reacting to pain, U = unresponsive