Pediatric Early Warning Score (PEWS)
The Pediatric Early Warning Score (PEWS) is a validated clinical scoring system designed to identify hospitalized children at risk of clinical deterioration. It is widely used in pediatric wards, emergency departments, and critical care settings globally.
About
The Pediatric Early Warning Score (PEWS) was developed by Monaghan in 2005 at the University of Southampton, UK. It is a physiological scoring system that assesses three key domains — behavior, cardiovascular status, and respiratory status — each scored 0-3, with an additional optional 2 points for persistent vomiting post-surgery. The total PEWS ranges from 0 to 11. Higher scores indicate greater clinical concern and trigger escalation of care protocols. PEWS has been validated across multiple pediatric populations and is recommended by the Royal College of Paediatrics and Child Health (RCPCH) and the National Institute for Health and Care Excellence (NICE) for early detection of deteriorating pediatric patients.
Formula
PEWS = Behavior(0-3) + Cardiovascular(0-3) + Respiratory(0-3) + Persistent Vomiting(0-2)
The PEWS total score is the sum of three domain scores plus an optional modifier. Each domain — behavior, cardiovascular, and respiratory — is scored from 0 (normal) to 3 (severe impairment). An additional 2 points are added if the child has persistent vomiting following surgery. The minimum score is 0 and the maximum is 11. Scores of 3 or higher generally trigger increased monitoring frequency, while scores of 5 or higher require urgent medical review.
Score Interpretation
The Pediatric Early Warning Score (PEWS) is a validated clinical tool for early detection of deterioration in hospitalized children. Its clinical significance is supported by robust evidence across multiple domains. First, PEWS enables early identification of clinical deterioration before adverse events occur, allowing timely intervention that can prevent cardiorespiratory arrest. Second, PEWS has been validated in diverse pediatric populations including general pediatric wards, emergency departments, and pediatric intensive care units. Third, the structured escalation protocol associated with PEWS reduces the incidence of unexpected PICU transfers and improves communication between nursing and medical staff. Fourth, PEWS is recommended by the Royal College of Paediatrics and Child Health (RCPCH) and the National Institute for Health and Care Excellence (NICE) as part of standard pediatric observation practice. The score takes less than 2 minutes to complete and can be performed by trained nursing staff at the bedside.
Low risk — 0–2
Scores in this range indicate stable clinical status. Continue routine monitoring per unit protocol. No escalation of care needed.
Management: No escalation needed. Continue routine PEWS monitoring per schedule.
Moderate risk — 3–4
Scores of 3-4 indicate a change from baseline requiring increased monitoring and nursing notification. The child should be reassessed within 30 minutes.
Management: Increase monitoring frequency. Inform charge nurse. Assess ABCs (airway, breathing, circulation). Repeat PEWS in 30 minutes.
High risk — 5–6
Scores of 5-6 indicate significant clinical deterioration requiring urgent physician review. Continuous monitoring and preparation for escalation should be initiated.
Management: Urgent medical review. Physician to assess within 15 minutes. Continuous monitoring. Prepare resuscitation equipment. Consider oxygen therapy and IV access.
Very high risk — Emergency — 7–11
Scores of 7 or higher indicate a critical clinical state requiring immediate emergency response. The MET or RRT team should be activated and PICU transfer considered.
Management: EMERGENCY — Activate MET/RRT team immediately. Consider PICU transfer. Prepare for respiratory or cardiac support. Senior physician at bedside.
Reference Ranges
| Population | Normal Range | Notes |
|---|---|---|
| Hospitalized children (0-18 years) — any pediatric inpatient setting | 0 – 2 (Low risk — routine monitoring) | Scores ≥3 trigger escalation protocol. Scores ≥5 require urgent medical review. Scores ≥7 require immediate emergency response (MET/RRT). |
Dr. Mahmoud El-Sayed
Dr. Mahmoud El-Sayed is a consultant pediatrician with over 20 years of experience in clinical practice, specializing in pediatric emergency medicine and critical care.
View medical review board & editorial policy →Example Calculation
A 4-year-old boy is admitted to the pediatric ward with pneumonia. Nursing assessment reveals: Behavior: irritable, not comforted by parents (2 points). Cardiovascular: CRT 4 seconds, mottled skin (2 points). Respiratory: RR 44 (↑20 from baseline of 24), O₂ requirement 40% via face mask, tracheal tug present (2 points). No persistent vomiting (0 points). Total PEWS = 2 + 2 + 2 + 0 = 6/11. This score falls in the "High risk" range (5-6). The clinical recommendation includes urgent physician review within 15 minutes, continuous monitoring, preparation of resuscitation equipment at the bedside, consideration of oxygen therapy escalation, and IV access. Repeat PEWS should be performed after each intervention to assess response.
Related Conditions
Related Medications
Common Mistakes
Delaying escalation while waiting for the "next scheduled" PEWS assessment when the child's clinical status has clearly deteriorated
PEWS is a structured tool to support clinical judgment, not replace it. If the child appears clinically worse despite a stable PEWS score, escalate immediately based on clinical concern. Always document the reason for escalation separately from the score.
Recording the worst-ever PEWS score rather than the current score during the assessment period
PEWS should reflect the child's status at the time of assessment. Document the current scores in each domain based on the examination findings at that moment. Trends over time are clinically important — serial scores showing an upward trend even within the same risk band warrant attention.
Frequently Asked Questions
How often should PEWS be assessed?
What PEWS score triggers escalation of care?
What should I do if I am clinically worried despite a low PEWS score?
References
- Monaghan A. Detecting and managing deterioration in children. Paediatr Nurs. 2005;17(1):32-35. PubMed
- Parshuram CS, Duncan HP, Joffe AR, et al. Multicentre validation of the bedside paediatric early warning system score: a severity of illness score to detect evolving critical illness in hospitalised children. Crit Care. 2011;15(4):R184. PubMed
- Tucker KM, Brewer TL, Baker RB, et al. Prospective evaluation of a pediatric inpatient early warning scoring system. J Spec Pediatr Nurs. 2009;14(2):79-85. PubMed