TY - JOUR T1 - Diagnostic yield of abdominal ultrasonography for the diagnosis of acute appendicitis: A global and subgroup analysis JO - Revista de GastroenterologĂ­a de MĂ©xico T2 - AU - Fortea-Sanchis,C. AU - Escrig-Sos,J. AU - Forcadell-Comes,E. SN - 2255534X M3 - 10.1016/j.rgmxen.2018.11.005 DO - 10.1016/j.rgmxen.2018.11.005 UR - http://revistagastroenterologiamexico.org/en-diagnostic-yield-abdominal-ultrasonography-for-articulo-S2255534X19300751 AB - Introduction and aimsAbdominal ultrasonography is very useful for diagnosing acute appendicitis and has 59-96% sensitivity and 83-98% specificity. The aim of the present study was to determine the diagnostic yield of abdominal ultrasound imaging for acute appendicitis and identify the patient subgroups with the best results. Materials and methodsPatients at a general hospital that underwent appendectomy due to the clinical suspicion of appendicitis, who also had a diagnostic radiologic study, within the time frame of January 2007 to December 2010, were analyzed. Ultrasound studies were considered positive when there were radiologic signs suggestive of acute appendicitis. The sensitivity, specificity, and predictive values of the diagnostic study were determined through the logistic regression method. ResultsA total of 646 patients were operated on due to clinical suspicion of acute appendicitis. A diagnostic abdominal ultrasound study was carried out on 383 (59.3%) of those patients, resulting in 79% sensitivity (74-83, 95% CI), 58% specificity (39-75, 95% CI), 95% positive predictive value (92-97, 95% CI), and 20% negative predictive value (13-30, 95% CI). ConclusionsAbdominal ultrasound imaging in patients with a high suspicion of appendicitis had a mediocre diagnostic yield, but better results could be achieved in different specific subgroups. ER -