Background: In acute appendicitis, abdominal computerized tomography (abdominal CT) has increased diagnostic certainty. The clinical criteria of Alvarado show some utility in the diagnosis of acute appendicitis. Objective: To determine the correlation between the Alvarado Clinical Scale and the radiological finding by abdominal CT in relation to the diagnosis of acute appendicitis in patients with acute abdominal pain. Material and methods: We included 62 patients with suspected acute appendicitis treated in the emergency room. The criteria of the Alvarado Scale were related to the abdominal CT findings of the abdomen. Results: Seventy-one percent (n = 43) of patients diagnosed with appendicitis in relation to abdominal CT findings and in agreement with the Alvarado Scale showed an average risk (4-6 points). the results adjusted to the Alvarado Scale score at 5 points as upper and lower limit to form two groups, 77% (n = 47) of patients with appendicitis diagnosed in relation to Tomographic findings and in agreement with the Alvarado Scale showed a high risk (> 5 points). The coefficient of contiguity V of Cramer was 0.32 (p <0.05). Conclusion: We found a low coefficient of correlationn between Alvarado's criteria and abdominal CT.
