Approximately 2.5% of adults in the UK have been diagnosed with psoriasis. However, it is difficult to estimate the number of people with psoriasis in other countries, mainly because each country has a different way of diagnosing this condition. Also, there are variations in the availability and quality of dermatology services between countries. Consequently, this can make it difficult to estimate how many people have the disease.
Although the differences above are frustrating, we can estimate the number of cases of psoriasis in some countries. Consequently, we know that the number of cases of psoriasis around the world ranges between 0.27% and 11.4% of the population. It is likely that differences in age, location, ethnicity, income, genetic and environmental factors probably affect the number of people with psoriasis in each country. Later posts give more information on these differences.
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