The prevalence of chronic pain increases with age.
In Canada, 29% of adults aged 35 to 54 years suffer from chronic pain, and 39% of those aged 55 and over 1. According to a compilation of data from several countries (Canada, France, Australia, United Kingdom, Spain, Sweden, Scotland, Netherlands), chronic pain affect on average 36% of adults 2.
An increase of 70% of chronic pain is expected within 25 years because of aging of the population 3. Also, surgeries that we practice more and more, often leave patients with persistent pain. The removal of the breast and knee arthroscopy are good examples of common operations that often leave scars 4.
Women are more prone to chronic pain 5. We know that testosterone protects men from the pain. However, the relationship between estrogen and the pain is not yet clear. Many women see their pain increased during the days preceding menstruation and after menopause, periods characterized by lower estrogen.
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