| Characteristics | Internal prediagnoses (, %) | Surgical prediagnoses (, %) | value |
| Total patient number | 258 | 76.8 | 78 | 23.2 | |
| Gender | | | | | | Male | 121 | 46,9 | 41 | 52,6 | | Female | 137 | 53,1 | 37 | 47,4 | |
| Vital signs | | | | | | Blood pressure (mmHg) | | 120 ± 24,1 | | Heart rate (beats/min) | | | | Fever | | | |
| Complaints accompanying abdominal pain | | | | | | Nausea | 123 | 47.7 | 43 | 55.1 | | Vomiting | 96 | 37.7 | 38 | 48.7 | | Loss of appetite | 31 | 12 | 4 | 5.1 | | Constipation | 31 | 12 | 14 | 17.9 | | Inability to intestinal gas extraction | 14 | 5,4 | 24 | 30.4 | 0,001 | Diarrhea | 34 | 13.2 | 3 | 3.8 | 0,021 | Dysuria | 28 | 10.9 | 7 | 9 | | Jaundice | 36 | 14 | 2 | 2.6 | 0,005 |
| Length of ED stay | | | | | | 0–6 hours | 117 | 45,3 | 24 | 30,8 | 0,002 | 6–12 hours | 73 | 28,3 | 38 | 48,7 | 12–24 hours | 25 | 9,7 | 10 | 12,8 | Over 24 hours | 43 | 16.7 | 6 | 7,7 |
| Duration of abdominal pain | | | | | | 0–24 hours | 55 | 21,3 | 13 | 16,7 | | Over 24 hours | 203 | 78,7 | 65 | 83,3 | |
| Length of stay in the hospital | | | | | | 1 day | 126 | 48.8 | 13 | 16,7 | 0,001 | 1–4 days | 30 | 11.6 | 15 | 19,2 | 4–10 days | 48 | 18.6 | 23 | 29,5 | More than 10 days | 54 | 21 | 27 | 34,6 |
| Choice of treatment | | | | | | Medical | 251 | 97,3 | 26 | 33,3 | 0,001 | Surgical | 7 | 2,7 | 52 | 66,7 |
| Consultation | | | | | | Internal medicine | 114 | 59,7 | 4 | 5,4 | 0,001 | General surgery | 22 | 11,5 | 50 | 67,6 | Internal medicine and general surgery | 33 | 17,3 | 3 | 4,1 | Other consultations | 22 | 11,5 | 17 | 23 |
| Outcomes | | | | | | Recovery | 120 | 46,5 | 11 | 14,1 | 0,001 | Vegetative stage | 113 | 43,8 | 51 | 65,4 | Exitus | 25 | 9,7 | 16 | 20,5 |
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