National Early Warning Score 2 — acute-illness severity
SpO₂ target range
Scale 1 — target 94–98%
Scale 2 — target 88–92% (e.g. COPD)
Respiratory rate (per min)
Oxygen saturation (%, Scale 1)
Systolic blood pressure (mmHg)
Pulse (per min)
Temperature (°C)
On supplemental oxygen
Consciousness (ACVPU)
Alert
New confusion, or Voice / Pain / Unresponsive
Enter all five vital signs to calculate
Evidence
Original publication
Royal College of Physicians. National Early Warning Score (NEWS) 2: Standardising the assessment of acute-illness severity in the NHS. Updated report of a working party. London: RCP; 2017. (Consensus report, not PubMed-indexed.)
Royal College of Physicians, 2017
Validation
Smith GB, Prytherch DR, Meredith P, Schmidt PE, Featherstone PI. The ability of the National Early Warning Score (NEWS) to discriminate patients at risk of early cardiac arrest, unanticipated ICU admission, and death. Validation of the aggregate-weighted NEWS on which NEWS2 is based.
Resuscitation, 2013
Open source
Last reviewed: 2026-09
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