Paediatric Early Warning Score to Detect Deterioration in Paediatric Patients at a Tertiary Care Hospital of a Developing Country: A Validation Study.

Objective: To test the validity of the paediatric early warning score (PEWS) and to identify the patients with deteriorating clinical conditions who were reviewed by a rapid response team (RRT) and were advised higher level of care.

Study design: Observational study. Place and Duration of the Study: Paediatric ward and high dependency unit (HDU) of The Aga Khan University Hospital (AKUH), Karachi, Pakistan, from January 2021 to March 2022.

Methodology: All children aged 1 month to 18 years, admitted with non-surgical diagnoses at AKUH and referred for an RRT consultation were identified by non-probability consecutive sampling. The bedside nurse assessed the PEWS and alerted the clinical team. The patient's further course of action was decided based on the PEWS, detailed systemic examination, and laboratory workup. This aided in deciding the level of care (General ward, HDU, Paediatric Intensive Care Unit) required by the patients. Patients with length of stay >24 hours were included and those with did not resuscitate orders were excluded.

Results: Overall 10,032 patients were admitted to the ward and high dependency unit (HDU). Out of which, 323 (3.2%) patients had an RRT call and were included in the study. The median age of the study population was 3.15 years during the study period, and 30.3% were <1 year. System-wise admission diagnoses included respiratory (33.2%) and neurological diseases (16.1%). Median [interquartile range (IQR)] PEWS at RRT call was 2 (IQR, 1-2) on median admission day 2 (IQR, 1-3). The cumulative data at PEWS ≥3 demonstrated an area under the curve of 63% with a sensitivity of 90% and a specificity of 30%.

Conclusion: PEWS >3 can probably identify the patients at risk of deterioration with excellent sensitivity.

Key words: Paediatrics, Rapid response team, Early warning score.