Decision making in patients with acute abdominal pain at a university and at a rural hospital: does the value of abdominal sonography differ?

Table 4 Sensitivity, Specificity and Accuracy of Sonography at the UH and RH

	True Positive	Sensitivity	True Negative	Specificity	Total	False positive	False negative	Total	Accuracy
UH	50	93%	43	82%	93	3	10	13	87%
RH	29	95%	23	94%	52	2	1	3	95%
Total	79	94%	66	88%	145	5	11	16	91%

True positive and negative findings where the sonographic diagnosis corresponded to the intraoperative finding or to the final diagnosis. False positives or negatives were sonographic findings that were not identical to the diagnosis after 2 weeks.
Accuracy was defined as the rate of correct final diagnosis, reconfirmed after 2 weeks.

ISSN: 1749-7922