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Clinical reference calculator Β· GeraClinic

MEWS (Modified Early Warning Score) Calculator

The Modified Early Warning Score (MEWS) aggregates systolic blood pressure, heart rate, respiratory rate, temperature and conscious level into a single bedside score to flag deteriorating patients.

Quick answer

The Modified Early Warning Score (MEWS) turns five bedside observations β€” systolic blood pressure, heart rate, respiratory rate, temperature and conscious level (AVPU) β€” into a single score from 0 to 14 using the original Subbe 2001 table. A total of 5 or more is linked to higher mortality and ICU admission.

MEWS observations

Validated formula

Original Subbe (2001) table. Systolic BP: ≀70 = 3, 71–80 = 2, 81–100 = 1, 101–199 = 0, β‰₯200 = 2. Heart rate: <40 = 2, 41–50 = 1, 51–100 = 0, 101–110 = 1, 111–129 = 2, β‰₯130 = 3. Respiratory rate: <9 = 2, 9–14 = 0, 15–20 = 1, 21–29 = 2, β‰₯30 = 3. Temperature: <35 = 2, 35–38.4 = 0, β‰₯38.5 = 2. AVPU: Alert = 0, reacting to Voice = 1, reacting to Pain = 2, Unresponsive = 3. Total range 0–14.

Interpretation

  • 0–4β€” Lower risk β€” routine monitoring; reassess per local protocol.
  • β‰₯5β€” Higher risk β€” statistically associated with increased mortality and ICU/HDU admission; escalate and review urgently.

How to use the MEWS calculator

  1. 1Enter the vital signs. Enter systolic blood pressure, heart rate, respiratory rate and temperature, and select the conscious level (Alert, Voice, Pain or Unresponsive).
  2. 2Read the aggregate score. The tool applies the Subbe 2001 point table to each observation and totals them (0–14).
  3. 3Escalate per protocol. A score of 5 or more is associated with deterioration and should prompt urgent review and escalation under local policy.

Medical disclaimer: This is general health information, not medical advice. It does not diagnose or treat any condition, and the results are estimates based on public reference formulas. Always consult a qualified doctor about your individual health. If you think you may have a medical emergency, contact your local emergency services immediately.

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Frequently asked questions

What MEWS score is concerning?βŒ„

A total of 5 or more is statistically associated with increased mortality and ICU or high-dependency admission, and should trigger urgent clinical review. Local escalation protocols may set their own thresholds.

How is MEWS different from NEWS2?βŒ„

MEWS is the older aggregate early-warning score (Subbe 2001). NEWS2 is the standardised UK National Early Warning Score, which adds oxygen saturation and supplemental-oxygen scoring and uses a different point table.

Does MEWS diagnose a condition?βŒ„

No. It is a track-and-trigger tool that flags deteriorating patients so they are reviewed sooner. It does not identify the cause.

Sources & validation

This calculator reproduces the published MEWS score, validated for early detection of clinical deterioration in ward patients.

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