The NEWS2 Scoring System
The National Early Warning Score 2 (NEWS2) is a standardised physiological scoring system used across NHS Scotland and the wider UK to identify patients at risk of deterioration on the ward. It aggregates six physiological parameters — respiratory rate, oxygen saturations (with two scales depending on whether the patient is a known CO2 retainer), supplemental oxygen, systolic blood pressure, heart rate, level of consciousness (using the ACVPU scale), and temperature — into a single score. Each parameter is scored 0–3 based on deviation from normal, with a score of 3 on any single parameter triggering an immediate escalation response regardless of the total score.
The ACVPU scale used in NEWS2 replaces the older AVPU scale: Alert, Confusion (new confusion, disorientation, or agitation), Voice, Pain, Unresponsive. The addition of ‘Confusion’ as a distinct category reflects the significance of new acute confusion as a predictor of deterioration.
| NEWS2 Score | Clinical Risk | Recommended Response |
| 1–4 | Low | Increased monitoring frequency; ward nurse escalates to ward doctor |
| 5–6 | Medium | Urgent review by ward team; consider calling outreach or ICU for advice |
| ≥7 | High | Emergency response: ICU outreach, registrar, or consultant review immediately |
| 3 on any single parameter | High (regardless of total) | Emergency response as above — single extreme value always triggers urgent review |
It is important to appreciate that NEWS2 is a tool to aid clinical judgement, not replace it. A patient with a NEWS2 of 4 who appears seriously unwell to an experienced clinician should be escalated as urgently as one with a NEWS2 of 8. The score provides a common language and a safety net, but it does not override clinical assessment.
| CLINICAL PEARL A patient on high-flow oxygen who appears well and has a NEWS2 of 5 may be masking severe respiratory failure. Always ask: ‘What would happen if I removed the oxygen?’ The underlying pathophysiology matters more than any number. |