48% Perforation Rate in Appendicitis Cases Assessed Beyond 72 Hours in 45,000-Patient Global Cohort

The AlliGatOr collaboration collected data on 45,000 patients with suspected appendicitis, tracking time from symptom onset to first surgical review and from review to operation. Perforation, confirmed intraoperatively or by imaging, increased stepwise with prehospital delay while in-hospital waits showed no independent association. CT availability fell from 58.6% in high-income to 5.6% in low-income settings, and laparoscopic rates dropped from 95.8% to 7.3%, patterns consistent with earlier single-country audits in sub-Saharan Africa and South Asia.

These disparities compound the time-dependent risk: observational data from prior national registries indicate each additional 12-hour delay beyond 24 hours adds roughly 8-10 percentage points to perforation probability. Public-education campaigns in high-income systems that shortened median presentation time by 18 hours produced measurable drops in complicated appendicitis, suggesting similar leverage exists where imaging and minimally invasive capacity remain limited.

The study design establishes temporal associations but cannot isolate causation from unmeasured factors such as disease severity at onset or transport infrastructure. Next-step research requires cluster-randomized trials of referral-pathway interventions paired with diagnostic-capacity scaling to test whether perforation can be held below 30% at scale.