National Early Warning Score vs Rapid Response Team criteria-Prevalence, misclassification, and outcome

Purpose The purpose of this study was to examine the prevalence of deviating vital parameters in general ward patients using rapid response team (RRT) criteria and National Early Warning Score (NEWS), assess exam duration, correct calculation and classification of risk score as well as mortality and adverse events. Methods Point prevalence study of vital parameters according to NEWS and RRT criteria of all adult patients admitted to general wards at a Scandinavian university hospital with a mature RRT. Primary outcome: prevalence of at-risk patients fulfilling at least one RRT criteria, total NEWS of 7 or greater or a single NEWS parameter of 3 (red NEWS). Secondary outcomes: mortality in-hospital and within 30 days or adverse events within 24 hours. Results We assessed 598 (75%) of 798 admitted patients and examiners captured a fulfilled RRT calling criterion in 50 patients (8.4%), 36 (6.0%) had NEWS >= 7, 34 with a red NEWS parameter. Red NEWS occurred in 112 patients (18.7%). Secondary outcomes were fulfilled in 49 patients (8.2%). Mortality overall was 6.5% within 30 days, 1.8% in hospital. In 134 patients (22.4%) the manual calculation of score for NEWS was incorrectly performed by examiner. Conclusion Even with a mature RRT in place, we captured patients with failing physiology in general wards reflecting afferent limb failure. Manual calculation of NEWS is frequently incorrect, possibly leading to misclassification of patients at risk.