Cost analysis of antibiotic therapy versus appendectomy for treatment of uncomplicated acute appendicitis: 5-year results of the APPAC randomized clinical trial

BackgroundThe efficacy and safety of antibiotic treatment for uncomplicated acute appendicitis hasbeen established at long-term follow-up with the majority of recurrences shown to occurwithin the first year. Overall costs of antibiotics are significantly lower compared with appendectomyat short-term follow-up, but long-term durability of these cost savings is unclear.The study objective was to compare the long-term overall costs of antibiotic therapy versusappendectomy in the treatment of uncomplicated acute appendicitis in the APPAC (APPendicitisACuta) trial at 5 years.Methods and findingsThis multicentre, non-inferiority randomized clinical trial randomly assigned 530 adultpatients with CT-confirmed uncomplicated acute appendicitis to appendectomy or antibiotictreatment at six Finnish hospitals. All major costs during the 5-year follow-up were recorded,whether generated by the initial visit and subsequent treatment or possible recurrent appendicitis.Between November 2009 and June 2012, 273 patients were randomized to appendectomyand 257 to antibiotics. The overall costs of appendectomy were 1.4 times higher(pCI: €3879 to €4463) resulting in cost savings of €1545 per patient (95% CI: €1193 to €1899;ppatients did not undergo appendectomy.ConclusionsAt 5-year follow-up antibiotic treatment resulted in significantly lower overall costs comparedwith appendectomy. As the majority of appendicitis recurrences occur within the first yearafter the initial antibiotic treatment, these results suggest that treating uncomplicated acuteappendicitis with antibiotics instead of appendectomy results in lower overall costs even atlonger-term follow-up.