Accuracy of ICD-9 codes in identifying patients with peptic ulcer and gastrointestinal hemorrhage in the regional healthcare administrative database of Umbria

• Massimiliano Orso,

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliations Health Planning Service, Regional Health Authority of Umbria, Perugia, Italy, Division of Cardiology, Santa Maria della Misericordia Hospital, University of Perugia School of Medicine, Perugia, Italy

  http://orcid.org/0000-0003-0200-1202

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• Iosief Abraha ,

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

  * E-mail: iosief_a@yahoo.it

  Affiliations Health Planning Service, Regional Health Authority of Umbria, Perugia, Italy, Centro Regionale Sangue, Servizio Immunotrasfusionale, Azienda Ospedaliera di Perugia, Perugia, Italy

  http://orcid.org/0000-0002-5440-775X

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• Anna Mengoni,

  Roles Investigation, Writing – review & editing

  Affiliation Division of Cardiology, Santa Maria della Misericordia Hospital, University of Perugia School of Medicine, Perugia, Italy

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• Fabrizio Taborchi,

  Roles Validation, Writing – review & editing

  Affiliation Gastroenterologia, Azienda Ospedaliera di Perugia, Perugia, Italy

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• Marcello De Giorgi,

  Roles Resources, Writing – review & editing

  Affiliation Health ICT Service, Regional Health Authority of Umbria, Perugia, Italy

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• David Franchini,

  Roles Resources, Writing – review & editing

  Affiliation Health ICT Service, Regional Health Authority of Umbria, Perugia, Italy

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• Paolo Eusebi,

  Roles Formal analysis, Writing – review & editing

  Affiliation Health Planning Service, Regional Health Authority of Umbria, Perugia, Italy

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• Anna Julia Heymann,

  Roles Resources, Visualization, Writing – review & editing

  Affiliation Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche, Perugia, Italy

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• Alessandro Montedori,

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

  Affiliation Health Planning Service, Regional Health Authority of Umbria, Perugia, Italy

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• Giuseppe Ambrosio,

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

  Affiliation Division of Cardiology, Santa Maria della Misericordia Hospital, University of Perugia School of Medicine, Perugia, Italy

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• Francesco Cozzolino

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Validation, Visualization, Writing – original draft, Writing – review & editing

  Affiliations Health Planning Service, Regional Health Authority of Umbria, Perugia, Italy, Division of Cardiology, Santa Maria della Misericordia Hospital, University of Perugia School of Medicine, Perugia, Italy

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