Self-selection vs Randomized Assignment of Treatment for Appendicitis

Area of Science:

• Medical research
• Clinical trials
• Gastroenterology

Background:

• Antibiotics have shown effectiveness as an alternative to appendectomy for appendicitis in adults.
• However, comparisons between randomized trial participants and patients who self-select treatment are lacking.
• Understanding these differences is crucial for treatment generalizability.

Purpose of the Study:

• To compare patient characteristics and outcomes between the randomized cohort and the self-selection cohort in the Comparison of Outcomes of Antibiotic Drugs and Appendectomy (CODA) trial.
• To explore the generalizability of randomized trial findings to a broader patient population.

Main Methods:

• A secondary analysis of the CODA randomized clinical trial (RCT) was conducted.
• Compared characteristics and outcomes of 1094 randomized participants with 510 participants who declined randomization and self-selected treatment (253 appendectomy, 257 antibiotics).
• Exploratory analysis of cohort status and receipt of appendectomy.

Main Results:

• Clinical characteristics were similar between the self-selection and randomized cohorts, with some differences in language, education, and insurance.
• Most outcomes were similar between the cohorts.
• The rate of appendectomy by 30 days was comparable: 15.3% in self-selected antibiotics vs. 19.2% in randomized antibiotics, with differences mainly in the non-appendicolith subgroup.

Conclusions:

• The study suggests that outcomes in the CODA randomized trial are generalizable to the broader patient population.
• Patients who self-select treatment show similar outcomes to those in randomized trials for appendicitis.
• Antibiotics represent a valid treatment option comparable to appendectomy.