How NEWS2 is calculated
NEWS2 is a weighted early-warning score built from six physiological parameters plus a consciousness check, with extra points if the patient is on supplemental oxygen.
| Parameter | 3 pts | 2 pts | 1 pt | 0 pts |
|---|---|---|---|---|
| Resp. rate (/min) | ≤8 or ≥25 | 21–24 | 9–11 | 12–20 |
| SpO₂ (%) | ≤91 | 92–93 | 94–95 | ≥96 |
| Air or oxygen | — | On oxygen | — | Room air |
| Temperature (°C) | ≤35.0 | ≥39.1 | 35.1–36.0 or 38.1–39.0 | 36.1–38.0 |
| Systolic BP (mmHg) | ≤90 | 91–100 | 101–110 | 111–219 |
| Heart rate (/min) | ≤40 or ≥131 | 111–130 | 41–50 or 91–110 | 51–90 |
| Consciousness | — | — | — | Alert (3 pts if not alert) |
The total is the sum of all seven components.
Normal values & response
| Score | Clinical response |
|---|---|
| 0 | Routine monitoring |
| 1 – 4 | Ward-based response; increase monitoring frequency |
| 3 in any single parameter | Urgent review, regardless of total |
| 5 – 6 | Urgent review by a clinician with critical care skills |
| ≥ 7 | Emergency assessment — consider critical care |
Clinical use
NEWS2 standardises detection of acute clinical deterioration on general wards, prompting earlier escalation for sepsis, respiratory failure, and other emergencies. It is a trend and trigger tool, not a diagnosis — a rising score over serial observations is itself an important signal, and any single parameter scoring 3 warrants urgent review even if the total is otherwise low.
Frequently asked questions
What is NEWS2?
The National Early Warning Score 2 is a bedside scoring system combining six vital signs plus a consciousness check to detect early clinical deterioration on general hospital wards.
What NEWS2 score is considered an emergency?
A total score of 7 or more indicates an emergency requiring urgent assessment, often with consideration of critical care input. A score of 3 in any single parameter also warrants urgent review, regardless of the total.
Who uses NEWS2?
It's used by nursing and medical staff on general wards, primarily in UK and NHS-aligned hospital systems, to standardise recognition of acutely deteriorating patients.
Why does NEWS2 add points for supplemental oxygen use?
Needing oxygen to maintain saturation is itself a sign of physiological compromise — so NEWS2 adds points specifically for being on oxygen, on top of the oxygen saturation reading itself, to avoid under-scoring a patient whose oxygen is masking how unwell they are.
References
- Royal College of Physicians. National Early Warning Score (NEWS) 2: Standardising the assessment of acute-illness severity in the NHS. Updated report. London: RCP, 2017.