Objective To assess accuracy of emergency medical service (EMS) telephone triage in identifying patients who need an EMS response and identify factors which affect triage accuracy. Design Observational cohort study. Setting Emergency telephone triage provided by Yorkshire Ambulance Service (YAS) National Health Service (NHS) Trust. https://www.markbroyard.com/hot-save-turbo-air-m3f24-1-n-29-wide-m3-series-reach-in-freezer-featuring-one-solid-door-energy-star-on-sale-top-super/