Table 2. Patient characteristics.

Values are presented as number of patients (%) unless otherwise indicated.

Group 1, nonperforation; group 2, perforation identified pathologically but not surgically; group 3, perforation identified surgically but not pathologically; group 4, perforation identified both pathologically and surgically; SD, standard deviation; IQR, interquartile range. ^a)8:00 AM to 5:00 PM on work days. ^b)Defined as the interval from the Emergency Department visit to the induction of anesthesia for appendectomy.