Insomnia and periodicity of headache in an arctic cluster headache population.

@article{Ofte2013InsomniaAP,
  title={Insomnia and periodicity of headache in an arctic cluster headache population.},
  author={Hilde Karen Ofte and Diana Hristova Berg and Svein Ivar Bekkelund and Karl Bj\ornar Alstadhaug},
  journal={Headache},
  year={2013},
  volume={53 10},
  pages={1602-12}
}
OBJECTIVE To assess the prevalence of chronic insomnia and the periodicity of headache attacks in an Arctic cluster headache population. BACKGROUND Cluster headache is a sleep-related disorder, and attacks have both circadian and circannual rhythmicity. METHODS Through a retrospective hospital chart review, we identified all subjects diagnosed with episodic cluster headache (ICD-10 G 44.0) at the Neurological Departments in Northern Norway (located north of 66°33'N) between January 1, 2000… CONTINUE READING
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Cluster headache - clinical pattern and a new severity scale in a Swedish cohort.

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