Table 1.

Final diagnoses in 422 patients clinically suspected of having acute appendicitis

Final diagnoses	N	%
Acute appendicitis	251	59
Other urgent surgical conditions	17	4
Acute diverticulitisa	6	1
Perforated viscus	3	1
Adhesive small bowel obstruction	2	0.5
Malignant bowel obstruction	2	0.5
Ovarian torsion	2	0.5
Acute cholecystitis	1	0.2
Acute peritonitis	1	0.2
Urgent non-surgical conditions	19	5
Gynaecological diseasesb	12	3
Retroperitoneal or abdominal wall bleeding	3	1
Urological diseasesc	3	1
Pneumonia	1	0.2
Non-urgent conditions	135	32
Nonspecific abdominal pain	67	16
Acute diverticulitisd	20	5
Inflammatory bowel disease	18	4
Gastrointestinal diseasese	15	4
Urological diseasesf	8	2
Malignancy	2	0.5
Gynaecological diseasesg	1	0.2
Other	4	1

^a Acute diverticulitis with free air and/or free abdominal fluid on computed tomography

^b Pelvic inflammatory disease, bleeding/ruptured ovarian cyst, tubo-ovarian abscess

^c Ureteral stones with obstruction, pyelonephritis

^d Acute diverticulitis without free air or free abdominal fluid on computed tomography

^e Gastroenteritis, acute appendagitis epiploica, cholecystolithiasis, obstipation

^f Renal and ureteral stones without obstruction, urinary tract infection

^g Ovulation pain/bleeding