prevalence is approximately10-15% of the general population (1)
affects females more often than males (approximate ratio 2:1)
annual incidence is probably 1-2%
only 20-30% of sufferers will ever consult their GP
constipation predominant IBS is more common in females
prevalence of IBS varies minimally with age (2)
IBS most often affects people between the ages of 20 and 30 years (3)
people presenting with IBS symptoms commonly report incomplete evacuation/ rectal hypersensitivity, as well as urgency, which is increased in diarrhoea-predominant IBS. About 20% of people experiencing faecal incontinence disclose their incontinence only if asked (3)
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