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Table 1 NEWS2, RETTS and the Predict Sepsis screening tools

From: Performance of NEWS2, RETTS, clinical judgment and the Predict Sepsis screening tools with respect to identification of sepsis among ambulance patients with suspected infection: a prospective cohort study

  NEWS2 (20) RETTS (21) Predict Sepsis screening tool 1 (27) Predict Sepsis screening tool 2 (27) Predict Sepsis screening tool 3 (27)
Number of included variables 6 9 variables in VS part described below + ESS* 6 4 6
Score considered positive for suspected sepsis  ≥ 5 is recom-mended (20) but some sepsis alerts (35) suggest ≥ 7 RETTS red is used in some sepsis alerts (36)  ≥ 2  ≥ 2  ≥ 2
Included variables with weights      
Respiratory rate  ≤ 8 = 3
9–11 = 1
12–20 = 0
21–24 = 2
 ≥ 25 = 3
 > 30 or < 8 = red
26–30 = orange
8–25 = green
X X  > 24 = 1
Oxygen saturation  ≤ 91 = 3
92–93 = 2
94–95 = 1
 ≥ 96 = 0
 < 90 with O2 = red
 < 90 without O2 = orange
90–95 without O2 = yellow
 > 95 without O2 = green
X X  < 94 = 1
Systolic blood pressure  ≤ 90 = 3
91–100 = 2 101–110 = 1 111–219 = 0 ≥ 220 = 3
 < 90 = red  ≤ 100 = 2  ≤ 100 = 2  ≤ 100 = 2
Heart rate  ≤ 40 = 3 41–50 = 1 51–90 = 0 91–110 = 1 111–130 = 2 ≥ 131 = 3 Regular > 130 or irregular > 150 = red
 > 120 or < 40 = orange
 > 110 or < 50 = yellow
50–110 = green
X X  > 110 = 1
Consciousness (AVPU in parenthesis)
GCS ≤ 14 (C, V, P, or U) = 3 GCS ≥ 15 (A) = 0
(RLS in parenthesis)
GCS < 8 (unconscious) = red
GCS 8–12 (2–3) = orange
GCS 13–14 (acutely disoriented) = yellow
GCS 15 (alert) = green
GCS < 15 = 2
History of acute altered mental status = 1
History of acute altered mental status and/or
GCS < 15 = 1
GCS < 15 = 2
Temperature, degrees C  ≤ 35,0 = 3 35,1–36,0 = 1 36,1–38,0 = 0 38,1–39,0 = 1 ≥ 39,1 = 2  > 41 or < 35 = orange
38.6–41 = yellow
35–38.5 = green
38.1–38.5 = 1
 > 38.5 = 2
38.1–38.5 = 1
 > 38.5 = 2
38.1–38.5 = 1
 > 38.5 = 2
Other variables X Obstructed airway = red
Stridor = red
Ongoing seizures = red
Gastrointestinal symptoms = 1
P-Lactate > 4.0 = 2
Gastrointestinal symptoms = 1 X
  1. NEWS2, National Early Warning Score 2; RETTS, Rapid Emergency Triage and Treatment System; VS, Vital sign; ESS, Emergency Symptoms and Signs; GCS, Glasgow Coma Scale; AVPU, Swedish consciousness scale (Alert, Verbal responsive, Pain responsive, Unresponsive); C, Confusion; V, response to Voice; P, response to Pain; U, Unresponsive