The median cost was:
NT$24,344 (+/- 67,787) (range: 3,812 - 318,479) for follow-up without recurrence,
NT$47,746 (+/- 45,731) (range: 37,709 - 129,763) for IA, and
NT$62,135 (+/- 26,882) (range: 17,216 - 360,330) for appendectomy performed after recurrence.
Thus, the average cost per patient would have been NT$47,746 with the routine use of IA and NT$34,483 with the routine use of conservative treatment (difference NT$13,263 per patient).