Results: Pediatric Early Warning System (PEWS) scores had a very good prognosis of risk of cardiac arrest or bradycardia with poor perfusion signs within 24 hours with Area Under the receiver operator characteristic Curve (AUC) was 0.935 (95% CI: 0.875 - 0.995); p < 0.001 at a threshold score of 5 (the sensitivity and specificity were 100% and 73.6%; respectively).