What are the NEWS2 risk thresholds and clinical response levels?

NEWS2 clinical response thresholds: Score 0 = Minimum 12-hourly monitoring, routine nursing assessment. Score 1–4 (low risk) = Minimum 4–6 hourly monitoring, inform nurse in charge. Score 5–6 (medium risk) OR single parameter score ≥3 = Urgent ward-based response, minimum hourly monitoring, inform medical team, consider ICU assessment. Score ≥7 (high risk) = Emergency response, continuous monitoring, immediate senior clinical assessment, consider critical care referral.

What is NEWS2 Scale 2 and when should I use it?

NEWS2 Scale 2 is used for patients with confirmed or at-risk hypercapnic respiratory failure — primarily COPD patients whose oxygen saturation target range is 88–92% rather than the standard ≥96%. On Scale 1, SpO2 ≥96% scores 0 points. On Scale 2, SpO2 88–92% scores 0 points (the target range), but SpO2 93–94% on supplemental O2 scores 1 point, 95–96% on O2 scores 2 points, and ≥97% on O2 scores 3 points — because over-oxygenation in hypercapnic patients drives CO2 retention and can be harmful.

What is the relationship between NEWS2 and sepsis screening?

A NEWS2 score ≥5 alongside a suspected infection should trigger the Sepsis Six care bundle (NHS England and UK Sepsis Trust guidance). NEWS2 is particularly effective for sepsis detection because it monitors the physiological parameters most commonly deranged by sepsis: tachycardia, tachypnoea, hypotension, fever or hypothermia, hypoxia, and altered consciousness. New confusion (C on the ACVPU scale) scores 3 points in NEWS2 and is particularly important as it may be the primary sepsis presentation in elderly patients.

What does a single parameter score of 3 mean in NEWS2?

A single NEWS2 parameter score of 3 triggers the same urgent clinical response as a total score of 5–6, regardless of the overall NEWS2 total. This is because extreme derangement in any single physiological parameter — such as respiratory rate ≤8 or ≥25 breaths/min, SpO2 ≤91%, systolic BP ≤90 mmHg, pulse ≤40 or ≥131 bpm, temperature ≤35°C, or ACVPU other than Alert — represents a critical clinical emergency that requires immediate assessment even when other parameters are within normal range.

How often should NEWS2 be calculated for hospitalised patients?

NEWS2 monitoring frequency is determined by the current score: Score 0 = minimum 12-hourly. Scores 1–4 = minimum 4–6 hourly. Score 5–6 or single parameter 3 = minimum hourly. Score ≥7 = continuous. Monitoring frequency should be increased at any time if the clinical team has concerns about a patient's condition, regardless of the current score. In critical care settings, NEWS2 is typically calculated continuously via electronic monitoring.

What are the NEWS2 risk thresholds and clinical response levels?

NEWS2 clinical response thresholds: Score 0 = Minimum 12-hourly monitoring, routine nursing assessment. Score 1–4 (low risk) = Minimum 4–6 hourly monitoring, inform nurse in charge. Score 5–6 (medium risk) OR single parameter score ≥3 = Urgent ward-based response, minimum hourly monitoring, inform medical team, consider ICU assessment. Score ≥7 (high risk) = Emergency response, continuous monitoring, immediate senior clinical assessment, consider critical care referral.

What is NEWS2 Scale 2 and when should I use it?

NEWS2 Scale 2 is used for patients with confirmed or at-risk hypercapnic respiratory failure — primarily COPD patients whose oxygen saturation target range is 88–92% rather than the standard ≥96%. On Scale 1, SpO2 ≥96% scores 0 points. On Scale 2, SpO2 88–92% scores 0 points (the target range), but SpO2 93–94% on supplemental O2 scores 1 point, 95–96% on O2 scores 2 points, and ≥97% on O2 scores 3 points — because over-oxygenation in hypercapnic patients drives CO2 retention and can be harmful.

What is the relationship between NEWS2 and sepsis screening?

A NEWS2 score ≥5 alongside a suspected infection should trigger the Sepsis Six care bundle (NHS England and UK Sepsis Trust guidance). NEWS2 is particularly effective for sepsis detection because it monitors the physiological parameters most commonly deranged by sepsis: tachycardia, tachypnoea, hypotension, fever or hypothermia, hypoxia, and altered consciousness. New confusion (C on the ACVPU scale) scores 3 points in NEWS2 and is particularly important as it may be the primary sepsis presentation in elderly patients.

What does a single parameter score of 3 mean in NEWS2?

A single NEWS2 parameter score of 3 triggers the same urgent clinical response as a total score of 5–6, regardless of the overall NEWS2 total. This is because extreme derangement in any single physiological parameter — such as respiratory rate ≤8 or ≥25 breaths/min, SpO2 ≤91%, systolic BP ≤90 mmHg, pulse ≤40 or ≥131 bpm, temperature ≤35°C, or ACVPU other than Alert — represents a critical clinical emergency that requires immediate assessment even when other parameters are within normal range.

How often should NEWS2 be calculated for hospitalised patients?

NEWS2 monitoring frequency is determined by the current score: Score 0 = minimum 12-hourly. Scores 1–4 = minimum 4–6 hourly. Score 5–6 or single parameter 3 = minimum hourly. Score ≥7 = continuous. Monitoring frequency should be increased at any time if the clinical team has concerns about a patient's condition, regardless of the current score. In critical care settings, NEWS2 is typically calculated continuously via electronic monitoring.

RCP 2017 · Scale 1 & 2 · Sepsis Screening · Single-Parameter Flag · NHS Mandated

NEWS2 Score Calculator

National Early Warning Score 2 — all 7 physiological parameters with Scale 1 and Scale 2 (COPD). Real-time scoring, single-parameter ≥3 alert, sepsis Sepsis Six flag (score ≥5 + suspected infection), and full EMR documentation.

Clinically reviewed by Dr. Nikhil Mahajan, PT, MPT · May 29, 2026

0 Minimum Risk 12-hourly monitoring

1–4 Low Risk 4–6 hourly monitoring

5–6 Medium Risk Hourly · urgent review

≥7 High Risk Continuous · emergency

Any 3 Single Param Flag = medium response

NEWS2 Scoring Reference — all 7 parameters

Respiration (br/min)

≤83

9–111

12–200

21–242

≥253

SpO₂ Scale 1 (%)

≤913

92–932

94–951

≥960

SpO₂ Scale 2 COPD (%)

≤833

84–852

86–871

88–920

93–94 + O₂1

95–96 + O₂2

≥97 + O₂3

Systolic BP (mmHg)

≤903

91–1002

101–1101

111–2190

≥2203

Pulse (bpm)

≤403

41–501

51–900

91–1101

111–1302

≥1313

Temperature (°C)

≤35.03

35.1–36.01

36.1–38.00

38.1–39.01

≥39.12

SpO₂ Scale:

Respiration Rate Count for 60 seconds · Normal: 12–20 br/min

—

br/min

≤8→3 · 9-11→1 · 12-20→0 · 21-24→2 · ≥25→3

Oxygen Saturation (SpO₂) Scale 1: ≥96% = normal · Scale 2 (COPD): 88–92% = target

—

S1: ≤91→3 · 92-93→2 · 94-95→1 · ≥96→0

Supplemental Oxygen Any supplemental O₂ delivery scores 2 points

—

Systolic Blood Pressure Normal: 111–219 mmHg · ≤90 or ≥220 = score 3

—

mmHg

≤90→3 · 91-100→2 · 101-110→1 · 111-219→0 · ≥220→3

Pulse Rate Normal: 51–90 bpm · ≤40 or ≥131 = score 3

—

bpm

≤40→3 · 41-50→1 · 51-90→0 · 91-110→1 · 111-130→2 · ≥131→3

Level of Consciousness — ACVPU New confusion scores 3 — a critical sepsis sign in elderly patients

—

Temperature Normal: 36.1–38.0°C · Both hypothermia and high fever score points

—

°C

≤35.0→3 · 35.1-36.0→1 · 36.1-38.0→0 · 38.1-39.0→1 · ≥39.1→2

Suspected infection present — screen for sepsis if NEWS2 ≥ 5

Trend Tracker Optional

Enter the patient's previous NEWS2 score to track trajectory (improving / deteriorating)

Previous NEWS2 Score (0–20)

Time of Previous Score

Answered 0 of 7

NEWS2 Score 0 / 20

Risk Level —

Single Param ≥3 —

NEWS2 Clinical Response Thresholds — RCP 2017

NEWS2 Score	Risk Level	Monitoring Frequency	Clinical Response
0	Minimum	12-hourly	Routine monitoring. Registered nurse to reassess next scheduled observation round.
1–4	Low	4–6 hourly	Inform nurse in charge. Nurse decides whether to increase frequency or escalate to medical team.
5–6	Medium	Hourly	Urgent ward-based response. Inform medical team — target ≤30 min response. Increase frequency to at least hourly. Consider moving to higher-care environment.
Any ≥3	Single-Param	Hourly	URGENT: Same response as score 5–6. Single extreme derangement triggers immediate clinical review regardless of total score.
≥7	High	Continuous	Emergency response. Immediate senior clinical assessment. Consider critical care referral (ICU/HDU). Continuous monitoring mandatory.

What is NEWS2? — National Early Warning Score 2 Complete Guide

The National Early Warning Score 2 (NEWS2) is a standardised clinical assessment tool developed by the Royal College of Physicians (RCP) to detect acute deterioration in hospitalised patients. First introduced in 2012 and updated in 2017, NEWS2 is mandated across all NHS hospitals in England and widely used internationally in acute and emergency care settings. NEWS2 scores seven physiological parameters — respiration rate, oxygen saturation, supplemental oxygen use, systolic blood pressure, pulse rate, level of consciousness (ACVPU), and temperature — producing a composite score that determines the urgency of clinical response required.

Why NEWS2 Replaced NEWS (2012)

The 2017 update introduced three key changes from the original NEWS: (1) addition of a second SpO₂ scale (Scale 2) for patients with hypercapnic respiratory failure, (2) replacement of the AVPU consciousness scale with ACVPU — adding "Confusion" as a separate level scoring 3 points, recognising that new confusion is frequently the first and only sign of acute deterioration in elderly patients and the primary sepsis presentation in older adults; and (3) explicit integration with sepsis screening pathways.

Scale 1 vs Scale 2 — When to Use Each

Scale 1 (standard) is used for all patients who do not have confirmed or at-risk hypercapnic respiratory failure. A SpO₂ of ≥96% scores 0 points. Scale 2 is used for patients with confirmed hypercapnic respiratory failure — primarily COPD patients who require target oxygen saturation of 88–92% rather than the standard ≥96%. On Scale 2, SpO₂ 88–92% scores 0 points. Critically, higher SpO₂ on supplemental oxygen scores progressively higher (1, 2, 3 points for 93–94%, 95–96%, ≥97%) — because over-oxygenation in these patients drives hypercapnia and CO₂ narcosis. The supplemental oxygen parameter always scores 2 points on either scale when any oxygen is being delivered.

NEWS2 and Sepsis Screening

NEWS2 is the most effective routine tool for sepsis detection in NHS hospitals. A NEWS2 score of ≥5 alongside a suspected infection should trigger the Sepsis Six care bundle (NHS England/UK Sepsis Trust). The physiological parameters monitored by NEWS2 — tachycardia, tachypnoea, hypotension, hypoxia, fever or hypothermia, and altered consciousness — are precisely those deranged in sepsis. The addition of confusion (C) to the ACVPU scale in NEWS2 is particularly important, as new confusion is frequently the only early sepsis sign in elderly patients who may not mount a fever or tachycardia.

NEWS2 vs Other Early Warning Scores

NEWS2 vs qSOFA: qSOFA (3 items: RR ≥22, altered mentation, SBP ≤100) is faster but less sensitive. NEWS2 has superior sensitivity for sepsis detection in ward patients. Use qSOFA for rapid screening outside hospital; use NEWS2 for structured ward monitoring.
NEWS2 vs SOFA Score: SOFA assesses organ dysfunction severity in ICU patients using laboratory values (bilirubin, creatinine, PaO₂/FiO₂). NEWS2 uses only bedside physiological parameters — no labs required. NEWS2 detects deterioration; SOFA quantifies established organ failure. Use both in critically ill patients.
NEWS2 vs APACHE II: APACHE II predicts ICU mortality using 12 physiological variables plus age and chronic health. NEWS2 is a dynamic real-time monitoring tool; APACHE II is a static admission severity score. Different purposes, often used together in ICU.

Dr. Nikhil Mahajan, PT, MPT Doctor of Physical Therapy · Reviewed May 29, 2026 · View full credentials

Frequently Asked Questions

What is the NEWS2 score and what does it measure?

NEWS2 (National Early Warning Score 2) assesses seven physiological parameters to detect acute deterioration: respiration rate, oxygen saturation, supplemental oxygen use, systolic blood pressure, pulse rate, level of consciousness (ACVPU), and temperature. Total scores range 0–20. It is mandated across NHS hospitals in England and validated for detecting acute illness severity, sepsis, and clinical deterioration requiring escalation.

What are the NEWS2 risk thresholds and monitoring frequencies?

Score 0 = 12-hourly monitoring (routine). Scores 1–4 (low) = 4–6 hourly monitoring, inform nurse in charge. Scores 5–6 (medium) OR any single parameter ≥3 = minimum hourly monitoring, urgent ward-based response, inform medical team (target ≤30 min response time). Scores ≥7 (high) = continuous monitoring, emergency response, immediate senior clinical review, consider critical care referral.

When should I use NEWS2 Scale 2 instead of Scale 1?

Scale 2 is used for patients with confirmed or at-risk hypercapnic respiratory failure — primarily COPD patients with a prescribed oxygen target of 88–92%. On Scale 2, SpO₂ 88–92% scores 0 (the target is met). However, if the patient is on supplemental O₂ and their SpO₂ is rising above 92%, this paradoxically scores higher points (1, 2, or 3) because over-oxygenation drives CO₂ retention in these patients. Document the scale used (1 or 2) in all NEWS2 records.

What does a single NEWS2 parameter score of 3 mean?

A single parameter score of 3 triggers the same urgent clinical response as a total NEWS2 score of 5–6 — minimum hourly monitoring and urgent ward-based review — regardless of the total score. This is because extreme derangement in any one parameter represents a critical physiological emergency. Examples: RR ≤8 or ≥25 breaths/min; SpO₂ ≤91% (Scale 1); SBP ≤90 mmHg; HR ≤40 or ≥131 bpm; temperature ≤35.0°C; any ACVPU other than Alert (C, V, P, or U).

How does NEWS2 integrate with sepsis screening?

NEWS2 ≥5 alongside a suspected infection should trigger the Sepsis Six care bundle (NHS England/UK Sepsis Trust): high-flow oxygen, blood cultures, IV antibiotics (within 1 hour), IV fluid challenge if hypotensive, serum lactate and FBC, and urine output monitoring. NEWS2 is particularly effective for sepsis detection because it monitors precisely the parameters deranged in sepsis. New confusion (scoring 3 in ACVPU) is frequently the only early sepsis sign in elderly patients.

Can NEWS2 be used in primary care, ambulance, and pre-hospital settings?

Yes — NEWS2 is validated for pre-hospital use and is recommended by NHS England for ambulance services. It is particularly useful for telephone triage (NHS 111), community nursing, care home assessments, and paramedic response to determine hospital transfer priority. In pre-hospital settings, Scale 1 is typically used unless the patient has a known prescription for 88–92% oxygen target. Some minor modifications may apply depending on local protocols.

References

Royal College of Physicians. National Early Warning Score (NEWS) 2: Standardising the assessment of acute-illness severity in the NHS. RCP, London. December 2017.
Smith GB, et al. The ability of the National Early Warning Score (NEWS) to discriminate patients at risk of early cardiac arrest, unanticipated intensive care unit admission, and death. Resuscitation. 2013;84(4):465-470.
NHS England. Deterioration — National Early Warning Scores. NHS England Patient Safety.
UK Sepsis Trust. Clinical tools — Sepsis Six. 2023. Available at sepsistrust.org.
Alam N, et al. The impact of the introduction of NEWS on the outcomes of patients admitted to hospital. Resuscitation. 2015;84:907-911.