GITNUXREPORT 2026

Appendicitis Statistics

Appendicitis is a common surgical emergency with higher rates in teens and young adults.

Sarah Mitchell

Senior Researcher specializing in consumer behavior and market trends.

First published: Feb 13, 2026

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Statistic 1

Overall perforation rate in appendicitis 20-30%

Statistic 2

Postoperative surgical site infection (SSI) rate 3-5% laparoscopic, 8-12% open

Statistic 3

Intra-abdominal abscess post-perforation 10-20%

Statistic 4

Mortality in perforated appendicitis 1-5% in adults, 0.5% in children

Statistic 5

Wound infection risk 4x higher if appendix not removed intact

Statistic 6

Postoperative ileus occurs in 5-10% of cases

Statistic 7

Sepsis in perforated cases 15-25%

Statistic 8

Readmission rate within 30 days 5-7% for appendectomy

Statistic 9

Fecal fistula post-op 1-2% in perforated appendicitis

Statistic 10

Portal vein thrombosis rare complication 0.2-1%

Statistic 11

Incisional hernia after open appendectomy 2-5% long-term

Statistic 12

Bowel obstruction from adhesions 1-3% within 5 years

Statistic 13

Clostridioides difficile infection post-antibiotics 2-5%

Statistic 14

Peritonitis mortality 5-10% if untreated perforation

Statistic 15

Urinary tract injury during surgery <1%

Statistic 16

Conversion to open rate 5-10% in laparoscopic appendectomy

Statistic 17

Bleeding requiring transfusion 0.5-1%

Statistic 18

Deep vein thrombosis prophylaxis reduces risk from 1.5% to 0.3%

Statistic 19

Recurrent appendicitis after conservative management 14% at 5 years

Statistic 20

Pneumonia post-op 1-2% in elderly patients

Statistic 21

Anastomotic leak rare in interval appendectomy 0.5%

Statistic 22

Chronic abdominal pain post-appendectomy 10-15%

Statistic 23

The lifetime risk of developing appendicitis is approximately 8.6% for males and 6.7% for females in the United States

Statistic 24

Annual incidence of appendicitis in the US is about 107,000 cases per year among individuals aged 10-30 years

Statistic 25

Global incidence rate of appendicitis ranges from 100 to 250 cases per 100,000 population annually

Statistic 26

Appendicitis accounts for 7-9% of all abdominal pain presentations in emergency departments worldwide

Statistic 27

Peak incidence of appendicitis occurs between ages 10-19 years, with rates up to 23.3 per 10,000 in adolescents

Statistic 28

Incidence of appendicitis has declined by 4% per year in the US from 2000-2016

Statistic 29

In children under 5 years, perforated appendicitis rate is 40-70% at presentation

Statistic 30

Appendicitis incidence is 1.1 times higher in urban vs rural areas in developed countries

Statistic 31

Seasonal variation shows higher appendicitis rates in summer months, up to 15% increase

Statistic 32

In the UK, appendectomy rates dropped 52% from 1997-2013 due to diagnostic improvements

Statistic 33

Appendicitis prevalence in males is 23% higher than in females aged 10-49 years

Statistic 34

Hospitalization rate for appendicitis in US: 11.2 per 10,000 population annually

Statistic 35

In developing countries, appendicitis incidence is lower at 50-100 per 100,000

Statistic 36

Elderly (>65 years) have appendicitis incidence of 3.2 per 10,000, with higher perforation rates

Statistic 37

Pediatric appendicitis rates: 15-20% of surgical emergencies in children

Statistic 38

US appendectomy volume: 250,000-300,000 annually

Statistic 39

Incidence in pregnant women: 1 in 800-1500 pregnancies

Statistic 40

Appendicitis is responsible for 2.5% of all surgical admissions in Europe

Statistic 41

Rising incidence in low-income countries by 2-3% annually due to dietary changes

Statistic 42

Neonatal appendicitis incidence: 0.04-0.2% of neonatal surgical cases

Statistic 43

Appendicitis mortality rate globally: 0.1-0.3% in uncomplicated cases

Statistic 44

In Australia, incidence is 152 per 100,000, highest among OECD countries

Statistic 45

Family history increases risk by 3-fold in first-degree relatives

Statistic 46

Appendicitis rates in immigrants rise to match host country within one generation

Statistic 47

US pediatric hospitalization for appendicitis: 78,000 annually

Statistic 48

Incidence peaks at 233 per 100,000 in males aged 10-14

Statistic 49

Global burden: 3.8 million DALYs lost annually due to appendicitis

Statistic 50

Appendicitis in HIV patients: incidence 2-4 times higher

Statistic 51

Decline in perforated appendicitis from 30% to 18% in US 2000-2010

Statistic 52

Appendicitis accounts for 1.1% of all hospital admissions in the US

Statistic 53

Male gender increases perforation risk by 1.3-fold

Statistic 54

Age >50 years raises perforation risk 4-fold

Statistic 55

Appendicolith presence increases perforation odds ratio 5.9

Statistic 56

Delay >36 hours symptoms increases perforation by 36%

Statistic 57

Family history of appendicitis OR 3.4

Statistic 58

Low fiber diet increases risk by 1.5-2 fold

Statistic 59

Smoking doubles perforation risk in adults

Statistic 60

Obesity (BMI>30) increases operative complications OR 2.2

Statistic 61

Prior abdominal surgery increases adhesions risk 2-fold

Statistic 62

Children <5 years perforation risk 70%

Statistic 63

Pregnancy increases diagnostic delay risk 2-fold

Statistic 64

Immunosuppression (steroids) OR 2.5 for perforation

Statistic 65

High altitude living decreases incidence by 20%

Statistic 66

Western diet (high fat/sugar) risk ratio 1.8

Statistic 67

Male circumcision not protective, but hygiene factors debated

Statistic 68

Diabetes increases perforation OR 1.7

Statistic 69

NSAID use prior may mask symptoms, delay diagnosis 20%

Statistic 70

Seasonal summer peak linked to viral infections OR 1.15

Statistic 71

Genetic predisposition HLA-DR4 allele association

Statistic 72

Low socioeconomic status increases perforation 1.5-fold

Statistic 73

Right lower quadrant pain is present in 80-90% of appendicitis cases upon presentation

Statistic 74

Anorexia occurs in 75-85% of patients with acute appendicitis

Statistic 75

Nausea and vomiting reported in 60-80% of appendicitis patients

Statistic 76

Fever (>38°C) present in 40-50% of uncomplicated appendicitis cases

Statistic 77

Rebound tenderness has sensitivity of 63% and specificity of 82% for appendicitis

Statistic 78

Alvarado score ≥7 has sensitivity 82% and specificity 81% for appendicitis diagnosis

Statistic 79

Ultrasound sensitivity for appendicitis: 86% in adults, 95% in children

Statistic 80

CT scan sensitivity 94-98%, specificity 95-99% for acute appendicitis

Statistic 81

Leukocytosis (>10,000 WBC/mm³) in 80-90% of cases

Statistic 82

CRP >10 mg/L has sensitivity 78% for appendicitis

Statistic 83

Migratory pain from periumbilical to RLQ in 50-60% of patients

Statistic 84

Guarding present in 60% of perforated appendicitis cases

Statistic 85

Appendicitis score (PAS) in children: score ≥6 sensitivity 97%, specificity 94%

Statistic 86

MRI sensitivity 97%, specificity 95% for appendicitis in pregnancy

Statistic 87

Low-grade fever (37.3-38.5°C) in 50% of early appendicitis

Statistic 88

Absence of vomiting reduces likelihood ratio of appendicitis to 0.2

Statistic 89

Hyperbilirubinemia (>1 mg/dL) in 25% of gangrenous/perforated cases

Statistic 90

Urinalysis showing pyuria in 20-30% without UTI

Statistic 91

Rovsing's sign positive in 60-80% of appendicitis patients

Statistic 92

Psoas sign sensitivity 19%, specificity 91%

Statistic 93

Obturator sign in 8-10% of pelvic appendicitis cases

Statistic 94

AIR score ≥5 has sensitivity 86%, NPV 95% for appendicitis

Statistic 95

Appendiceal diameter >6mm on US indicates inflammation (sensitivity 75%)

Statistic 96

Non-visualization of appendix on US reduces probability by 34%

Statistic 97

Wall thickness >3mm on CT highly suggestive (specificity 95%)

Statistic 98

Fecalith on imaging present in 15-30% of cases

Statistic 99

Appendicolith increases perforation risk 5-fold

Statistic 100

Laparoscopic appendectomy is the standard treatment with success rate >95%

Statistic 101

Open appendectomy perforation complication rate 4-10% higher than laparoscopic

Statistic 102

Antibiotic prophylaxis reduces SSI by 50% in appendectomy

Statistic 103

Non-operative management with antibiotics succeeds in 70-80% of uncomplicated cases

Statistic 104

Interval appendectomy after conservative treatment: 10-20% recurrence rate if omitted

Statistic 105

Laparoscopic vs open: hospital stay reduced by 1.1 days on average

Statistic 106

Cefoxitin or equivalent single-dose antibiotic for prophylaxis in low-risk cases

Statistic 107

Percutaneous drainage for abscess >3cm succeeds in 80-90%

Statistic 108

Postoperative antibiotics for perforated appendicitis: 3-5 days duration

Statistic 109

ERAS protocol reduces length of stay by 20% in appendectomy patients

Statistic 110

Single-incision laparoscopic appendectomy pain scores 1.2 points lower

Statistic 111

Antibiotics alone failure rate 27% at 1 year in adults

Statistic 112

Piperacillin-tazobactam for complicated appendicitis coverage 95% pathogens

Statistic 113

Robotic appendectomy operative time 15 min longer but lower conversion rate

Statistic 114

Early appendectomy (<12h symptoms) perforation rate 15% lower

Statistic 115

Triple antibiotics (ampicillin, gentamicin, clindamycin) for perforation in peds

Statistic 116

Outpatient management for uncomplicated appendicitis post-lap: 90% success

Statistic 117

Natural orifice transluminal endoscopic surgery (NOTES) feasibility 95%

Statistic 118

Postoperative nausea reduced 40% with multimodal analgesia

Statistic 119

Cefazolin + metronidazole prophylaxis SSI risk <5%

Statistic 120

Delayed surgery (>24h) increases perforation by 5% per 12h delay

Statistic 121

Antimicrobial stewardship shortens antibiotics to 4 days post-op uncomplicated

Statistic 122

Transversus abdominis plane block reduces opioid use by 50%

Statistic 123

Perforation mortality 0.2-0.5% with timely laparoscopic treatment

Statistic 124

Carbapenem-sparing regimens effective in 85% complicated cases

1/124

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While 1 in 12 men and 1 in 15 women will face appendicitis in their lifetime, a sudden, sharp pain in your lower right abdomen could be the first sign of this surprisingly common medical emergency that we'll explore with all the crucial statistics in this post.

Key Takeaways

The lifetime risk of developing appendicitis is approximately 8.6% for males and 6.7% for females in the United States
Annual incidence of appendicitis in the US is about 107,000 cases per year among individuals aged 10-30 years
Global incidence rate of appendicitis ranges from 100 to 250 cases per 100,000 population annually
Right lower quadrant pain is present in 80-90% of appendicitis cases upon presentation
Anorexia occurs in 75-85% of patients with acute appendicitis
Nausea and vomiting reported in 60-80% of appendicitis patients
Laparoscopic appendectomy is the standard treatment with success rate >95%
Open appendectomy perforation complication rate 4-10% higher than laparoscopic
Antibiotic prophylaxis reduces SSI by 50% in appendectomy
Overall perforation rate in appendicitis 20-30%
Postoperative surgical site infection (SSI) rate 3-5% laparoscopic, 8-12% open
Intra-abdominal abscess post-perforation 10-20%
Male gender increases perforation risk by 1.3-fold
Age >50 years raises perforation risk 4-fold
Appendicolith presence increases perforation odds ratio 5.9

Appendicitis is a common surgical emergency with higher rates in teens and young adults.

Complications

Overall perforation rate in appendicitis 20-30%
Postoperative surgical site infection (SSI) rate 3-5% laparoscopic, 8-12% open
Intra-abdominal abscess post-perforation 10-20%
Mortality in perforated appendicitis 1-5% in adults, 0.5% in children
Wound infection risk 4x higher if appendix not removed intact
Postoperative ileus occurs in 5-10% of cases
Sepsis in perforated cases 15-25%
Readmission rate within 30 days 5-7% for appendectomy
Fecal fistula post-op 1-2% in perforated appendicitis
Portal vein thrombosis rare complication 0.2-1%
Incisional hernia after open appendectomy 2-5% long-term
Bowel obstruction from adhesions 1-3% within 5 years
Clostridioides difficile infection post-antibiotics 2-5%
Peritonitis mortality 5-10% if untreated perforation
Urinary tract injury during surgery <1%
Conversion to open rate 5-10% in laparoscopic appendectomy
Bleeding requiring transfusion 0.5-1%
Deep vein thrombosis prophylaxis reduces risk from 1.5% to 0.3%
Recurrent appendicitis after conservative management 14% at 5 years
Pneumonia post-op 1-2% in elderly patients
Anastomotic leak rare in interval appendectomy 0.5%
Chronic abdominal pain post-appendectomy 10-15%

Complications Interpretation

Appendicitis, while seemingly routine, is a masterclass in surgical humility, where a 20-30% chance of a perforated appendix can unleash a cascade of potential complications, reminding us that even a tiny, useless organ can wield a statistically significant capacity for mischief.

Epidemiology

The lifetime risk of developing appendicitis is approximately 8.6% for males and 6.7% for females in the United States
Annual incidence of appendicitis in the US is about 107,000 cases per year among individuals aged 10-30 years
Global incidence rate of appendicitis ranges from 100 to 250 cases per 100,000 population annually
Appendicitis accounts for 7-9% of all abdominal pain presentations in emergency departments worldwide
Peak incidence of appendicitis occurs between ages 10-19 years, with rates up to 23.3 per 10,000 in adolescents
Incidence of appendicitis has declined by 4% per year in the US from 2000-2016
In children under 5 years, perforated appendicitis rate is 40-70% at presentation
Appendicitis incidence is 1.1 times higher in urban vs rural areas in developed countries
Seasonal variation shows higher appendicitis rates in summer months, up to 15% increase
In the UK, appendectomy rates dropped 52% from 1997-2013 due to diagnostic improvements
Appendicitis prevalence in males is 23% higher than in females aged 10-49 years
Hospitalization rate for appendicitis in US: 11.2 per 10,000 population annually
In developing countries, appendicitis incidence is lower at 50-100 per 100,000
Elderly (>65 years) have appendicitis incidence of 3.2 per 10,000, with higher perforation rates
Pediatric appendicitis rates: 15-20% of surgical emergencies in children
US appendectomy volume: 250,000-300,000 annually
Incidence in pregnant women: 1 in 800-1500 pregnancies
Appendicitis is responsible for 2.5% of all surgical admissions in Europe
Rising incidence in low-income countries by 2-3% annually due to dietary changes
Neonatal appendicitis incidence: 0.04-0.2% of neonatal surgical cases
Appendicitis mortality rate globally: 0.1-0.3% in uncomplicated cases
In Australia, incidence is 152 per 100,000, highest among OECD countries
Family history increases risk by 3-fold in first-degree relatives
Appendicitis rates in immigrants rise to match host country within one generation
US pediatric hospitalization for appendicitis: 78,000 annually
Incidence peaks at 233 per 100,000 in males aged 10-14
Global burden: 3.8 million DALYs lost annually due to appendicitis
Appendicitis in HIV patients: incidence 2-4 times higher
Decline in perforated appendicitis from 30% to 18% in US 2000-2010
Appendicitis accounts for 1.1% of all hospital admissions in the US

Epidemiology Interpretation

While young males lead the statistically awkward charge on this common surgical adventure, our collective vigilance and improved diagnostics are thankfully turning the tide, making the appendix's infamous plot twist less frequent and less fatal over time.

Risk Factors

Male gender increases perforation risk by 1.3-fold
Age >50 years raises perforation risk 4-fold
Appendicolith presence increases perforation odds ratio 5.9
Delay >36 hours symptoms increases perforation by 36%
Family history of appendicitis OR 3.4
Low fiber diet increases risk by 1.5-2 fold
Smoking doubles perforation risk in adults
Obesity (BMI>30) increases operative complications OR 2.2
Prior abdominal surgery increases adhesions risk 2-fold
Children <5 years perforation risk 70%
Pregnancy increases diagnostic delay risk 2-fold
Immunosuppression (steroids) OR 2.5 for perforation
High altitude living decreases incidence by 20%
Western diet (high fat/sugar) risk ratio 1.8
Male circumcision not protective, but hygiene factors debated
Diabetes increases perforation OR 1.7
NSAID use prior may mask symptoms, delay diagnosis 20%
Seasonal summer peak linked to viral infections OR 1.15
Genetic predisposition HLA-DR4 allele association
Low socioeconomic status increases perforation 1.5-fold

Risk Factors Interpretation

While your appendix seems democratically willing to rupture in anyone, it shows clear favoritism by dramatically upping the odds for men, smokers, the elderly, and anyone who treats vegetables with suspicion, but it curiously loses enthusiasm at high altitudes.

Symptoms/Diagnosis

Right lower quadrant pain is present in 80-90% of appendicitis cases upon presentation
Anorexia occurs in 75-85% of patients with acute appendicitis
Nausea and vomiting reported in 60-80% of appendicitis patients
Fever (>38°C) present in 40-50% of uncomplicated appendicitis cases
Rebound tenderness has sensitivity of 63% and specificity of 82% for appendicitis
Alvarado score ≥7 has sensitivity 82% and specificity 81% for appendicitis diagnosis
Ultrasound sensitivity for appendicitis: 86% in adults, 95% in children
CT scan sensitivity 94-98%, specificity 95-99% for acute appendicitis
Leukocytosis (>10,000 WBC/mm³) in 80-90% of cases
CRP >10 mg/L has sensitivity 78% for appendicitis
Migratory pain from periumbilical to RLQ in 50-60% of patients
Guarding present in 60% of perforated appendicitis cases
Appendicitis score (PAS) in children: score ≥6 sensitivity 97%, specificity 94%
MRI sensitivity 97%, specificity 95% for appendicitis in pregnancy
Low-grade fever (37.3-38.5°C) in 50% of early appendicitis
Absence of vomiting reduces likelihood ratio of appendicitis to 0.2
Hyperbilirubinemia (>1 mg/dL) in 25% of gangrenous/perforated cases
Urinalysis showing pyuria in 20-30% without UTI
Rovsing's sign positive in 60-80% of appendicitis patients
Psoas sign sensitivity 19%, specificity 91%
Obturator sign in 8-10% of pelvic appendicitis cases
AIR score ≥5 has sensitivity 86%, NPV 95% for appendicitis
Appendiceal diameter >6mm on US indicates inflammation (sensitivity 75%)
Non-visualization of appendix on US reduces probability by 34%
Wall thickness >3mm on CT highly suggestive (specificity 95%)
Fecalith on imaging present in 15-30% of cases
Appendicolith increases perforation risk 5-fold

Symptoms/Diagnosis Interpretation

Diagnosing appendicitis is a bit like assembling a jigsaw puzzle where half the pieces belong to other boxes, demanding you use history, exam, and imaging together because no single clue is a sure bet.

Treatment

Laparoscopic appendectomy is the standard treatment with success rate >95%
Open appendectomy perforation complication rate 4-10% higher than laparoscopic
Antibiotic prophylaxis reduces SSI by 50% in appendectomy
Non-operative management with antibiotics succeeds in 70-80% of uncomplicated cases
Interval appendectomy after conservative treatment: 10-20% recurrence rate if omitted
Laparoscopic vs open: hospital stay reduced by 1.1 days on average
Cefoxitin or equivalent single-dose antibiotic for prophylaxis in low-risk cases
Percutaneous drainage for abscess >3cm succeeds in 80-90%
Postoperative antibiotics for perforated appendicitis: 3-5 days duration
ERAS protocol reduces length of stay by 20% in appendectomy patients
Single-incision laparoscopic appendectomy pain scores 1.2 points lower
Antibiotics alone failure rate 27% at 1 year in adults
Piperacillin-tazobactam for complicated appendicitis coverage 95% pathogens
Robotic appendectomy operative time 15 min longer but lower conversion rate
Early appendectomy (<12h symptoms) perforation rate 15% lower
Triple antibiotics (ampicillin, gentamicin, clindamycin) for perforation in peds
Outpatient management for uncomplicated appendicitis post-lap: 90% success
Natural orifice transluminal endoscopic surgery (NOTES) feasibility 95%
Postoperative nausea reduced 40% with multimodal analgesia
Cefazolin + metronidazole prophylaxis SSI risk <5%
Delayed surgery (>24h) increases perforation by 5% per 12h delay
Antimicrobial stewardship shortens antibiotics to 4 days post-op uncomplicated
Transversus abdominis plane block reduces opioid use by 50%
Perforation mortality 0.2-0.5% with timely laparoscopic treatment
Carbapenem-sparing regimens effective in 85% complicated cases

Treatment Interpretation

The scalpel may have met its match in the antibiotic, but when your appendix throws a complicated party, modern surgery still RSVPs with a 95% success rate, a shorter stay, and a clear plan to gatecrash any infection.

Sources & References

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