Patient characteristics, outcomes and costs following interhospital transfer to a tertiary facility for appendectomy versus patients who present directly.

Background: Recent healthcare policy changes have emphasized pay-for-performance. Previous studies have not examined outcome differences between primary presenting appendicitis patients and transferred patients.

Methods: A retrospective cohort design examined appendicitis patients between March 2011 and 2013. Patients < age 18, were scheduled for an elective appendectomy, who were pregnant or had an interval appendectomy were excluded.

Results: The transfer cohort (n = 59) had more comorbidities, more severe American Society of Anesthesiologists status, a higher rate of pre-operative abscess/rupture as well as higher rates of perforation, gangrene, intra-operative drain placement and open conversion versus primary presenting patients (n = 622). After statistical regression adjustment, a higher open conversion rate in the transfer cohort, OR = 3.48 (95%CI: 1.04-11.61) and higher total costs $672.47 (95%CI: $68.75-$1276.19) remained.

Conclusions: Adjustments in clinical outcome/reimbursement metrics may be needed to address the complexity of transfers and the subsequent higher in-hospital costs on tertiary facilities.

Level Of Evidence: IV.