The exact incidence of haemorrhoidal disease is difficult to quantify due to differences in healthcare access. In the US, the prevalence is approximately 4% and is more common in white patients than in black patients, with presentation peaking between the ages of 45-65 years. Since the second half of the 20th century, there appears to be an unexplained decrease in the prevalence of symptomatic haemorrhoidal disease in both the US and England.
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