Call Rates, Acuity and Outcomes Across Deprivation Quintiles: A Service Evaluation Using Yorkshire Ambulance Service Data with Embedded Patient and Public Involvement

Background/Objectives: Socioeconomic deprivation is consistently associated with worse health outcomes and unequal access to healthcare in England. Less is known about how deprivation relates to ambulance service use, call acuity and recorded outcomes. Yorkshire Ambulance Service (YAS) NHS Trust introduced NHS Pathways triage into its 999 service during 2025, replacing the Advanced Medical Priority Dispatch System and aligning 999 triage with the tool already in use in NHS 111, providing an opportunity to describe call patterns across the deprivation gradient under a standardised clinical assessment framework. This evaluation aimed to quantify and describe call rates, acuity and recorded outcomes across communities with varying levels of deprivation in Yorkshire, using routine NHS 111 and 999 call data, with embedded Patient and Public Involvement and Engagement (PPIE) to contextualise the findings.