| As the Alvarado Score is numerical, it has been evaluated for ruling in and ruling out appendicitis. Studies ruling out appendicitis (using Alvarado < 3-4) have a sensitivity of 96%; studies ruling in appendicitis (using Alvarado > 6-7) have a sensitivity of 58-88%, depending on the study and score cutoffs used.The 2007 McKay study (see below) recommends CT scan for Alvarado 4-6, surgical consultation for Alvarado ≥ 7, and for Alvarado ≤ 3, no CT for diagnosing appendicitis, as appendicitis is unlikely. |
