Examples of African implementation experiences

Although evidence remains limited, several African initiatives illustrate how EWS can be introduced within resource-constrained healthcare environments.

Angola provides an illustrative example. The cross-cultural adaptation of NEWS2 into Angolan Portuguese improved the linguistic clarity and contextual usability of the tool without altering the physiological variables or scoring thresholds [19]. In Angola, efforts to integrate structured deterioration-recognition systems are taking place in hospitals where paper-based observation charts remain common, nurse-to-patient ratios vary considerably, continuous physiological monitoring is often unavailable outside critical care, and rapid response teams are uncommon. Consequently, successful integration depends not only on the score itself but also on simple observation tools, clear escalation pathways, workforce training and organisational support. Additional work from Angola has explored consensus-based approaches to identifying priorities for deterioration recognition and response within local healthcare systems [20]. Rather than propose a new physiological score, the study highlighted the importance of operational factors such as workforce capacity, escalation procedures and staff education, reinforcing the importance of integrating EWS into routine clinical practice.

Evidence from sub-Saharan Africa suggests that existing EWS can demonstrate useful predictive performance, although further multicentre validation studies are required before considering model updating or recalibration [21,22]. Such work is essential because prognostic models should not be assumed to perform identically across different healthcare environments. Qualitative implementation research has further identified barriers, including workload pressures, inconsistent monitoring practices, equipment availability and organisational support [21]. Collectively, these strategies reinforce the principle that Early Warning Systems should be regarded as complex health-system interventions rather than isolated scoring tools. Lessons from Angola and other African countries demonstrate that adapting clinical workflows, workforce training and escalation pathways can facilitate successful integration of EWS into routine care.