Fig. 1

Flow chart of patients. AAP acute abdominal pain; ICD international classification of disease; MTS Manchester triage system; R10 abdominal and pelvic pain. ¹For 3,904 of these patients, an additional ICD 10 diagnosis R10 was recorded, for 3,384 patients, the MTS indicator “AAP in adults” was recorded, and for 1,348 all three categories were recorded. ²For 1,306 of these patients an additional MTS indicator “AAP in adults” was recorded