Demographics
Labels Xeroderma Pigmentosum
The frequency of xeroderma pigmentosum varies from country to country.
In the United States, it is estimated to affect between one person in 250,000
and onein 1,000,000. In Japan, however, XP is much more common, striking
one person in every 22,000. It is also more common in the Middle East
and North Africa than in Europe or North America. The reason for these
geographical differences is not yet known for certain but is thought to be
associated with the high rates of marriages within extended families in
some of these countries.
In all countries, XP affects men and women equally. Within the
United States, it affects all races and ethnic groups equally.
In the United States, it is estimated to affect between one person in 250,000
and onein 1,000,000. In Japan, however, XP is much more common, striking
one person in every 22,000. It is also more common in the Middle East
and North Africa than in Europe or North America. The reason for these
geographical differences is not yet known for certain but is thought to be
associated with the high rates of marriages within extended families in
some of these countries.
In all countries, XP affects men and women equally. Within the
United States, it affects all races and ethnic groups equally.
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