View source for 26. Epidemiology and prevention of inflammatory bowel diseases

* IBD
** Epidemiology
*** More common in urbanized areas of Western countries
*** Higher incidence in northern than southern countries
*** White, Ashkenazi Jews
*** Age of onset 15 – 30
*** Women = men
** Etiology
*** Physical inactivity
*** Diet
**** Low intake of fibre
**** High intake of fat
**** Vitamin D deficiency
*** Hygiene hypothesis
**** Extremely hygienic environments predispose to immunological diseases
*** Family history
*** High socioeconomic status
*** Urbanization
*** Drugs
**** Contraceptives
**** NSAIDs
** Prognosis
*** No cure
*** Mortality similar to healthy
*** Needs a lifetime of care
*** Requires many physician visits, hospitalizations
*** Major cause of disability
** Prevention
*** Tertiary
* Crohns
** Epidemiology
*** Prevalence: 300 / 100 000
*** Incidence: 24 / 100 000
** Specific risk factors
*** Smoking
*** NOD2
** Prognosis
*** 75% require surgery
* UC
** Epidemiology
*** Prevalence: 500 / 100 000
*** Incidence: 12 / 100 000
** Specific risk factors
*** Not smoking
** Prognosis
*** 25% require surgery

[[Category:Public health 5 - Detailed epidemiology]]