The Impact of Helical Computed Tomography on the Negative Appendectomy Rate: A Multi-Center Comparison

Abstract Emergency departments have different strategies concerning the use of computed tomography (CT) for diagnosing appendicitis. We explored the association between CT utilization rates and the negative appendectomy rates in patients with suspected appendicitis at three medical centers. A retrospective multi-center comparative study was conducted to determine the association between CT use and negative appendectomy rates at three different medical centers. Standardized extraction of data from medical records and operative reports was performed by trained investigators. Of the 339 patients included, 242 (71.4%) were imaged with abdominal CT before appendectomy (CT group), whereas the remaining patients were not (non-CT group). Thirty-six of the 339 patients (10.6%) were found to have negative appendectomies. The CT group had a significantly lower negative appendectomy rate than the non-CT group (6.6% vs. 20.6%, respectively, p p p p