Radiation proctitis epidemiology and demographics

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

Epidemiology and Demographics

Incidence

• 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 exact incidence of the radiation proctitis is not available and largely depends on number of factors such as:
• the dose of radiation,
• area of exposure,
• method of delivery,
• the use of cytoprotective agents,
• dose fraction regimens, and
• the interval between sessions.
• The incidence rate of radiation proctitis in patients treated with the external beam radiation therapy is estimated to range from 2% to 39%, depending upon the severity and grade of proctitis.
• The incidence rate of radiation proctitis in patients treated with brachytherapy is 8% to 13% when used alone and up to 21% in combination with other modalities.

Prevalence

• 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.
• The incidence of chronic radiation proctitis is estimated at 2%–20%

Case-fatality rate/Mortality rate

• 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].

Age

• 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].

Race

• 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].

Gender

• [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.

Region

• The majority of [disease name] cases are reported in [geographical region].

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