Fig. 1

The major error and very major error rates in categorical agreement. A very major error was defined as when a strain that was resistant according to ADM was assessed as “sensitive” by the E-test; this may result in the patient not receiving effective antibiotics, allowing the infection to continue. A major error was defined as when the strain was sensitive according to ADM but assessed as “resistant” by the E-test. True sensitive is sensitive percentage minus very major error rate while the true resistant is resistant percentage minus major error rate