Epidemiology
Acute appendicitis is one of the most common acute surgical abdominal emergencies.
[4]
Koepsell TD. In search of the cause of appendicitis. Epidemiology. 1991;2:319-321.
http://www.ncbi.nlm.nih.gov/pubmed/1742378?tool=bestpractice.com
More than 34,600 cases were treated in UK hospitals in 2006 to 2007. Most cases were in male subjects (30,120) and occurred predominantly in the 15 to 59 year age group. A large majority presented (29,576) as medical emergencies.
[5]
Health and Social Care Information Centre. Hospital episode statistics; England. http://www.hesonline.nhs.uk (last accessed 1 March 2017).
http://www.hesonline.nhs.uk
More than 250,000 appendectomies are performed each year in the US;
[6]
Owings MF, Kozak LJ. Ambulatory and inpatient procedures in the United States, 1996. Vital Health Stat 13. 1998;139:1-119.
http://www.cdc.gov/nchs/data/series/sr_13/sr13_139.pdf
http://www.ncbi.nlm.nih.gov/pubmed/9866429?tool=bestpractice.com
however, the incidence is lower in populations where a high-fibre diet is consumed.
[7]
Arnbjornsson E. Acute appendicitis and dietary fiber. Arch Surg. 1983;118:868-870.
http://www.ncbi.nlm.nih.gov/pubmed/6305309?tool=bestpractice.com
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.
[8]
Korner H, Sondenaa K, Soreide JA, et al. Incidence of nonperforated and perforated appendicitis: age-specific and sex-specific analysis. World J Surg. 1997;21:313-317.
http://www.ncbi.nlm.nih.gov/pubmed/9015177?tool=bestpractice.com
[9]
Addiss DG, Shaffer N, Fowler BS, et al. The epidemiology of appendicitis and appendectomy in the United States. Am J Epidemol. 1990;132:910-925.
http://www.ncbi.nlm.nih.gov/pubmed/2239906?tool=bestpractice.com
The rate of appendectomy is around 10 per 10,000 cases per year in the US.
[10]
Flum DR, Koepsell TD. The clinical and economic correlates of misdiagnosed appendicitis: nationwide analysis. Arch Surg. 2002;137:799-804.
http://archsurg.ama-assn.org/cgi/content/full/137/7/799
http://www.ncbi.nlm.nih.gov/pubmed/12093335?tool=bestpractice.com
This 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).