The incidence of trigeminal neuralgia is generally thought to be from 4 to 13 per 100,000 based on US and UK population studies. This means that 12,000 to 40,000 new cases are diagnosed in the US annually. There is a slight female predominance at all ages, and rates appear to increase with age, with reported incidence rates as high as 74 to 88 per 100,000 in elderly (>75 years of age) populations.
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