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Inpatient hospital fatality related to coding (ICD-9-CM) of the influenza diagnosis in Spain (2009-2015)

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  • Inpatient hospital fatality related to coding (ICD-9-CM) of the influenza diagnosis in Spain (2009-2015)

    BMC Infect Dis. 2019 Aug 7;19(1):700. doi: 10.1186/s12879-019-4308-5.
    Inpatient hospital fatality related to coding (ICD-9-CM) of the influenza diagnosis in Spain (2009-2015).

    San-Rom?n-Montero JM1, Gil Prieto R2, Gallardo Pino C2, Hinojosa Mena J2,3, Zapatero Gaviria A2,3, Gil de Miguel A2.
    Author information

    1 Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health and Immunology, Medical Microbiology and Nursing and Stomatology, Universidad Rey Juan Carlos, Avenida de Atenas s/n. Alcorc?n, 28922, Madrid, Spain. jesus.sanroman@urjc.es. 2 Department of Medicine and Surgery, Psychology, Preventive Medicine and Public Health and Immunology, Medical Microbiology and Nursing and Stomatology, Universidad Rey Juan Carlos, Avenida de Atenas s/n. Alcorc?n, 28922, Madrid, Spain. 3 Servicio de Medicina Interna, Hospital Universitario de Fuenlabrada, Fuenlabrada, Madrid, Spain.

    Abstract

    BACKGROUND:

    To analyze hospitalization episodes with an ICD-9 diagnosis code of influenza (codes 487 and 488) in any diagnostic position from 2009 to 2015 in the Spanish hospital surveillance system.
    METHODS:

    Information about age, length of stay in hospital, mortality, comorbidity with an influenza diagnosis code between 1 October 2009 and 30 September 2015 was obtained from the National Surveillance System for Hospital Data (Conjunto M?nimo B?sico de Datos, CMBD).
    RESULTS:

    52,884 hospital admissions were obtained. A total of 24,527 admissions corresponded to diagnoses ICD-9 code 487 (46.4%), and 28,357 (53.6%) corresponded to ICD-9 code 488. The global hospitalization rates were 8.7 and 10.6 per 100,000 people, respectively. Differences between the two diagnostic groups were found for each of the six analyzed seasons. The diagnostic ICD-9-CM 488, male gender, and high-risk patients classified by risk vaccination groups showed direct relationship with inpatient hospital death.
    CONCLUSIONS:

    Influenza diagnosis was present in a significant number of hospital admissions. The code used for diagnosis (ICD-9-CM 488), male sex, age groups and associated risk clinical conditions showed a direct relationship with inpatient hospital fatality.


    KEYWORDS:

    Epidemiology; Hospitalizations; Influenza virus; Inhospital mortality

    PMID: 31390988 DOI: 10.1186/s12879-019-4308-5
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