alexa Prevalence of narcolepsy symptomatology and diagnosis in the European general population.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Ohayon MM, Priest RG, Zulley J, Smirne S, Paiva T

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Abstract OBJECTIVE: To determine the prevalence of narcolepsy in the general population of five European countries (target population 205,890,882 inhabitants). METHODS: Overall, 18,980 randomly selected subjects were interviewed (participation rate 80.4\%). These subjects were representative of the general population of the UK, Germany, Italy, Portugal, and Spain. They were interviewed by telephone using the Sleep-EVAL expert system, which provided narcolepsy diagnosis according to the International Classification of Sleep Disorders (ICSD). RESULTS: Excessive daytime sleepiness was reported by 15\% of the sample, with a higher prevalence in the UK and Germany. Napping two times or more in the same day was reported by 1.6\% of the sample, with a significantly higher rate in Germany. Cataplexy (episodes of loss of muscle function related to a strong emotion), a cardinal symptom of narcolepsy, was found in 1.6\% of the sample. An ICSD narcolepsy diagnosis was found in 0.047\% of the sample: The narcolepsy was severe for 0.026\% of the sample and moderate in 0.021\%. CONCLUSION: This is the first epidemiologic study that estimates the prevalence of narcolepsy in the general population of these five European countries. The disorder affects 47 individuals/100,000 inhabitants.
This article was published in Neurology and referenced in Journal of Vaccines & Vaccination

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