Appendicitis is the most common cause of acute surgical abdomen in the United States, driving a steady flow of emergency cases each year. About 23% of acute cases progress to perforation, which is linked to longer recoveries in children. Hospital stay and care strategy matter, with perforated appendicitis lasting about 9.9 days versus 3.2 days for non-perforated disease.
Key Takeaways
- Appendicitis is the most common cause of acute surgical abdomen in the United States (incidence and emergency surgery context).
- 2019–2020 U.S. hospitalization rates show appendicitis as one of the leading causes of emergency abdominal surgery (rate varies by age and sex in NIS analyses).
- In the Global Burden of Disease (GBD) study, appendicitis is included within causes of ‘appendicitis’ with measurable incident cases and disability-adjusted life years (DALYs) by country and year.
- ~23% of patients with acute appendicitis are complicated by perforation, according to a meta-analysis estimate.
- Children with perforated appendicitis have a longer length of hospital stay than those with non-perforated appendicitis: 9.9 vs 3.2 days (reported in a U.S. multicenter study).
- In a systematic review/meta-analysis, laparoscopic appendectomy reduced surgical site infection compared with open surgery (RR reported with a statistically significant reduction).
- In CODA, antibiotic-first was associated with a lower rate of immediate adverse events compared with surgery (treatment-effect context in trial).
- In U.S. children, laparoscopic appendectomy adoption reached a majority share by the late 2000s/early 2010s in national data analyses.
- A U.S. national cohort study found that outpatient/observation patterns for uncomplicated appendicitis shifted over time following evidence for less invasive care.
Appendicitis drives frequent emergency surgery, and perforation and delayed care raise risks while laparoscopic approaches improve outcomes.
Related reading
01 · Category
Disease Burden10 stats
01
Appendicitis is the most common cause of acute surgical abdomen in the United States (incidence and emergency surgery context).
02
2019–2020 U.S. hospitalization rates show appendicitis as one of the leading causes of emergency abdominal surgery (rate varies by age and sex in NIS analyses).
03
In the Global Burden of Disease (GBD) study, appendicitis is included within causes of ‘appendicitis’ with measurable incident cases and disability-adjusted life years (DALYs) by country and year.
04
GBD 2019 provides estimates for incident cases and deaths from appendicitis by location, age, and sex (interactive results tool).
05
In a U.S. analysis using the National Inpatient Sample (NIS), appendectomy-related hospitalizations number in the hundreds of thousands annually (NIS-derived annual counts).
06
Approximately 250,000 appendectomies are performed annually in the United States (hospital-based estimate commonly used in U.S. literature).
07
In England, Hospital Episode Statistics-based analyses show appendectomy admission counts in the tens of thousands each year (England-only administrative data).
08
A 2014–2016 analysis reported that perforated appendicitis frequency is higher in young children, contributing to higher complication rates.
09
Perforation risk increases with delayed diagnosis; one cohort study reports perforation rates climbing with time to surgery.
10
Emergency department presentation is common: appendicitis is frequently first evaluated in EDs, as reflected in emergency-care utilization studies using administrative datasets.
Interpretation
Disease Burden Interpretation
Appendicitis creates a substantial disease burden in the United States, driving a large share of emergency abdominal surgeries and accounting for roughly 250,000 appendectomies each year.
02 · Category
Clinical Outcomes3 stats
01
~23% of patients with acute appendicitis are complicated by perforation, according to a meta-analysis estimate.
02
Children with perforated appendicitis have a longer length of hospital stay than those with non-perforated appendicitis: 9.9 vs 3.2 days (reported in a U.S. multicenter study).
03
In a systematic review/meta-analysis, laparoscopic appendectomy reduced surgical site infection compared with open surgery (RR reported with a statistically significant reduction).
Interpretation
Clinical Outcomes Interpretation
Across clinical outcomes, perforation complicates about 23% of acute appendicitis cases and is linked to a much longer hospital stay in children of 9.9 days versus 3.2 days, while laparoscopic appendectomy also shows fewer surgical site infections than open surgery.
More related reading
03 · Category
Treatment Patterns9 stats
01
In CODA, antibiotic-first was associated with a lower rate of immediate adverse events compared with surgery (treatment-effect context in trial).
02
In U.S. children, laparoscopic appendectomy adoption reached a majority share by the late 2000s/early 2010s in national data analyses.
03
A U.S. national cohort study found that outpatient/observation patterns for uncomplicated appendicitis shifted over time following evidence for less invasive care.
04
In a propensity-matched U.S. study, length of stay differed between laparoscopic and open appendectomy (reported in national claims data).
05
Single-incision laparoscopic appendectomy has been reported in series with comparable outcomes to conventional laparoscopy in selected patients (meta-analysis).
06
A meta-analysis reported higher failure/recurrence rates for antibiotics when an appendicolith is present compared with absence (quantified odds/relative risks).
07
In a systematic review, laparoscopic appendectomy reduces postoperative complications compared with open surgery in some studies (pooled risk estimates).
08
A randomized trial (APPAC) reported that about 27% of patients initially treated with antibiotics required appendectomy within 1 year.
09
In APPAC follow-up, recurrence after antibiotics-first uncomplicated appendicitis occurred in a substantial fraction over several years (longer-term recurrence quantified).
Interpretation
Treatment Patterns Interpretation
Across recent Treatment Patterns research, care has shifted toward less invasive and evidence-aligned approaches, such as antibiotic-first strategies showing lower immediate adverse events than surgery in CODA and widespread laparoscopic adoption reaching a majority share by the late 2000s or early 2010s, while outcomes of antibiotic management vary notably when an appendicolith is present.
report visual · Comparison
Complications in Acute Appendicitis
Patients with acute appendicitis can develop perforation, which is associated with higher complication burden and longer hospital stays.
2019–2020 U.S. hospitalization rates show appendicitis as one of the leading causes of emergency abdominal surgery (rate2019
~23% of patients with acute appendicitis are complicated by perforation, according to a meta-analysis estimate.
23%
Children with perforated appendicitis have a longer length of hospital stay than those with non-perforated appendicitis:
9.9
source-verifiedjamanetwork.com · pubmed.ncbi.nlm.nih.gov2019
Reference
Cite This Report
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APA
Emilia Santos. (2026, February 13). Appendicitis Statistics. Gitnux. https://gitnux.org/appendicitis-statistics
MLA
Emilia Santos. "Appendicitis Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/appendicitis-statistics.
Chicago
Emilia Santos. 2026. "Appendicitis Statistics." Gitnux. https://gitnux.org/appendicitis-statistics.
Sources & references
22 datasets cited across this report · attribution is report-level
+16 additional datasets cited (not shown individually)