Association between serum vitamin D and severe headache or migraine: A population-based analysis

• Shunfa Hao ,

  Roles Conceptualization, Methodology, Writing – original draft

  ¶‡ These authors contributed equally as joint senior authors

  Affiliations Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China, The First Clinical Medical School, Henan University of Traditional Chinese Medicine, Zhengzhou, China

  https://orcid.org/0009-0002-3417-0043

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• Renyi Qian ,

  Roles Conceptualization, Supervision

  ¶‡ These authors contributed equally as joint senior authors

  Affiliation Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China

  ⨯
• Yiru Chen ,

  Roles Formal analysis, Methodology

  ¶‡ These authors contributed equally as joint senior authors

  Affiliations Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China, The First Clinical Medical School, Henan University of Traditional Chinese Medicine, Zhengzhou, China

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• Jingfang Liu,

  Roles Conceptualization, Investigation

  Affiliations Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China, The First Clinical Medical School, Henan University of Traditional Chinese Medicine, Zhengzhou, China

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• Xiaoyan Xu,

  Roles Conceptualization, Methodology

  Affiliation Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China

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• Yunxiang Guan

  Roles Methodology, Writing – review & editing

  * E-mail: 18846187503@163.com

  Affiliation Department of Encephalopathy, The First Affiliated Hospital of Henan University of Traditional Chinese Medicine, Zhengzhou, China

  https://orcid.org/0009-0009-7067-0089

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