Combining Vital Signs and Laboratory Data in an Early Warning Score Stuart Jarvis

National Early Warning Score Based on vital signs measurements Resp. Rate (/min) ≤89–11 12–2021–24≥25 SpO 2 (%) ≤9192–9394–95≥96 Supplemental O 2 YesNo Temperature (°C) ≤ – –39.0 ≥39.1 Systolic BP (mmHg) ≤9091–100101–110111–219≥220 Heart rate (/min) ≤4041–5051–9091–110111–130≥131 Conscious level AlertNot alert

Lab Measurement selection haemoglobin white cell count urea creatinine sodium potassium albumin

A Lab EWS: LDT-EWS MALE Hb≤ ≥12.9 WCC≤ ≥16.7 U≤ ≥13.8 Cr≤ ≥180 Na≤ ≥141 K≤ ≥4.8 Alb≤ ≥35

A Lab EWS: LDT-EWS FEMALE Hb≤ ≥14.9 WCC≤ ≥14.9 U≤ ≥13.9 Cr≤ ≥158 Na≤ ≥141 K≤ ≥4.6 Alb≤ ≥35

Performance

Summary Laboratory based EWS (LDT-EWS) can discriminate final outcome LDT-EWS discriminates final outcome better than NEWS Combining LDT-EWS and NEWS offers best discrimination of final outcome