Anal fistula epidemiology and demographics

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Manpreet Kaur, MD [2]

Overview

The prevalence of anal fistula is approximately 1-2 per 10,000 individuals worldwide.
In England, the prevalence of anal fistula is approximately 18.4 per 100000 per year.
In Spain, the prevalence of anal fistula is approximately 1.04 per 10,000 per year.
In Italy, the prevalence of anal fistula is approximately 2.32 per 10,000 per year.^[1]^[2]

The incidence/prevalence of [disease name] is approximately [number range] per 100,000 individuals worldwide.
In [year], the incidence/prevalence of [disease name] was estimated to be [number range] cases per 100,000 individuals worldwide.
The prevalence of [disease/malignancy] is estimated to be [number] cases annually.

In [year], the incidence of [disease name] is approximately [number range] per 100,000 individuals with a case-fatality rate/mortality rate of [number range]%.
The case-fatality rate/mortality rate of [disease name] is approximately [number range].

Patients of all age groups may develop [disease name].
The incidence of [disease name] increases with age; the median age at diagnosis is [#] years.
[Disease name] commonly affects individuals younger than/older than [number of years] years of age.
[Chronic disease name] is usually first diagnosed among [age group].
[Acute disease name] commonly affects [age group].

There is no racial predilection to [disease name].
[Disease name] usually affects individuals of the [race 1] race. [Race 2] individuals are less likely to develop [disease name].

[Disease name] affects men and women equally.
[Gender 1] are more commonly affected by [disease name] than [gender 2]. The [gender 1] to [gender 2] ratio is approximately [number > 1] to 1.

[Disease name] is a common/rare disease that tends to affect [patient population 1] and [patient population 2].

↑ Zanotti C, Martinez-Puente C, Pascual I, Pascual M, Herreros D, García-Olmo D (2007). "An assessment of the incidence of fistula-in-ano in four countries of the European Union". Int J Colorectal Dis. 22 (12): 1459–62. doi:10.1007/s00384-007-0334-7. PMID 17554546.
↑ Sainio P (1984). "Fistula-in-ano in a defined population. Incidence and epidemiological aspects". Ann Chir Gynaecol. 73 (4): 219–24. PMID 6508203.