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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