Maternal age and the rising incidence of hypertensive disorders of pregnancy: A comprehensive analysis of national claims data from Japan

• Naomi Maeda,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Validation, Visualization, Writing – original draft

  Affiliations Department of Nursing, Sapporo Medical University School of Health Sciences, Sapporo, Japan, Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Masayuki Koyama ,

  Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – review & editing

  * E-mail: masa3yuki3@sapmed.ac.jp

  Affiliations Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan, Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan

  https://orcid.org/0000-0002-8165-5855

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• Shintaro Takatsuka,

  Roles Data curation, Formal analysis, Methodology, Resources, Software, Supervision, Validation

  Affiliation Center of Medical Education, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Keisuke Oyatani,

  Roles Conceptualization, Data curation, Formal analysis, Software, Visualization, Writing – review & editing

  Affiliation Department of Pediatrics, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Nobuaki Himuro,

  Roles Methodology, Resources, Software, Supervision, Writing – review & editing

  Affiliation Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Tasuku Mariya,

  Roles Methodology, Supervision, Writing – review & editing

  Affiliation Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan

  https://orcid.org/0000-0002-7110-980X

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• Yoshika Kuno,

  Roles Methodology, Supervision, Writing – review & editing

  Affiliations Department of Nursing, Sapporo Medical University School of Health Sciences, Sapporo, Japan, Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Shiro Hinotsu,

  Roles Methodology, Resources, Validation, Writing – review & editing

  Affiliation Biostatistics and Data Management, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Tsuyoshi Saito,

  Roles Resources, Supervision, Validation, Writing – review & editing

  Affiliation Department of Obstetrics and Gynecology, Sapporo Medical University School of Medicine, Sapporo, Japan

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• Hirofumi Ohnishi

  Roles Conceptualization, Funding acquisition, Methodology, Project administration, Resources, Supervision, Writing – review & editing

  Affiliations Department of Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan, Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan

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