Acute Appendicitis Management in Patients Aged Above 40 Years During the COVID-19 Pandemic: A Retrospective Study With Four Years of Follow-Up.

Background The COVID-19 pandemic led many units to increase their utilization of nonoperative management (NOM) of acute appendicitis, with the literature showing its non-inferiority when compared to operative management (OM). Therefore, we compared NOM to OM against standard guidelines in order to ascertain the effectiveness of NOM. Primary outcomes were rates of admission, complications, hospital length of stay (LOS), and the incidence of colonic malignancy following NOM upon subsequent bowel evaluation using colonoscopy and/or computed tomography (CT) scan. Methods This was a retrospective observational study done on patients who were admitted with acute appendicitis from January 2020 to January 2022 at Wirral University Teaching Hospital, UK. Data was electronically collected from medical records. Inclusion criteria were patients aged 40 years and above, admitted with a diagnosis of acute appendicitis using a CT scan, and who underwent either OM or NOM. Exclusion criteria were patients below 40 years old or not diagnosed with acute appendicitis. Results This study included 211 cases of acute appendicitis (female to male: 110:101), with a median age of 60. One hundred and twenty-five (60%) patients were managed operatively, while 86 cases (40%) were managed by NOM. All of the cases were diagnosed using a CT scan. The mean LOS for operative and non-operative cases were 4.77 and 4.89 days, respectively. When readmission days were added over the following three years, adjusted LOS was 5.35 days for operative cases, in comparison to 10.86 days for NOM. Forty-five percent of NOM cases had at least one episode of readmission, with 37% of them being in the first year. We found six cases of malignancy in the NOM cohort, none of which were detected on colonoscopy following discharge. Conclusion NOM is associated with increased LOS and increased readmission rates, and 44% of cases eventually required appendicectomy.