Fig. 1

Flow chart illustrating study cohort and exclusions. Abbreviations: Emergency medical dispatcher (EMD), Registered nurse (RN), "Swedish Index to Emergency Medical Assistance" (Swedish Index), "The Rapid Emergency Triage and Treatment System" (RETTS), "Emergency Signs and Symptoms" (ESS). *Caller declined care: n = 1295, Ambulance mission not completed: n = 101, Caller not found: n = 552: Assisting unit: n = 426, Ambulance assessment reported as “Same assessment as the dispatcher”: n = 3237. **In one (n = 1) call the EMD requested the support by an RN, but the request was not fulfilled/answered. ***Reported ambulance priority missing: n = 133. Non-corresponding ambulance priority reported: Child n = 1116, Blue n = 60, Caller dead at scene n = 213. ****Reported ambulance medical condition missing, n = 2445. Dispatched medical condition missing, n = 13. Non-corresponding medical conditions: Child-disease n = 190, Animal/Insect-bite n = 4, Hypo/Hyperthermia n = 3, Danger of life n = 1, Child-unconscious n = 14, Adult unconscious, n = 445, Suspected health service demand, n = 29. *****Calls with complete data on dispatched priority (Swedish Index Priority 1–3) and assessment by ambulance on priority (RETTS Red/Orange/Yellow/Green). ******Calls with complete and corresponding data on dispatched medical condition (Swedish Index) and ambulance assessment of medical condition (RETTS ESS)