Acute appendicitis is one of the most common acute surgical abdominal emergencies. More than 250,000 appendectomies are performed each year in the US; however, the incidence is lower in populations where a high-fiber diet is consumed. The overall lifetime risk of developing acute appendicitis is 8.6% for males and 6.7% for females; lifetime risk of appendectomy is around 12% in males and 23% in females.
Globally, the pooled incidence of appendicitis or appendectomy is around 100 per 100,000 person years. Data suggest a rapid increase in incidence in newly industrialized countries. The condition is most commonly seen in patients aged between early teens and late 40s. There is a slight male to female predominance (1.3:1).
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