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      Cobertura de vacunación antigripal y factores asociados en pacientes esplenectomizados de un sector de salud de Zaragoza (España) Translated title: Influenza vaccination coverages and related factors among splenectomy patients from a health sector in Zaragoza (Spain)

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          Abstract

          RESUMEN Fundamentos: La cobertura vacunal antigripal en grupos de riesgo ha sido postulada como un indicador de la calidad asistencial. El objetivo de este estudio fue conocer dicha tasa de vacunación en esplenectomizados. Sujetos y métodos: Se realizó un estudio transversal que incluyó a los esplenectomizados del sector Zaragoza III entre enero de 2012 y diciembre de 2016. La identificación de los pacientes se realizó a través de la base de datos del Servicio de Archivos y Documentación Clínica del hospital del sector, utilizando el código 41.5 de la Clasificación Internacional de Enfermedades (9ª edición). Las variables (sociodemográficas, quirúrgicas y el haber recibido información y consejo para vacunarse al ser atendido en la consulta hospitalaria de vacunas) fueron obtenidas revisando las historias de atención especializada y primaria. Se analizó la asociación con la vacunación en la campaña correspondiente a la fecha de la cirugía mediante un análisis bivariado y un modelo de regresión logística múltiple. Resultados: Fueron estudiados 81 pacientes. El 60,5% eran hombres, con una edad media de 56,3 años. Las neoplasias y las enfermedades hematológicas fueron los motivos más frecuentes de cirugía (64,2%). La tasa de vacunación fue del 58%. Recibir la recomendación de vacunación (OR=6,53; IC95%=1,88-22,69) y haber sido vacunado en la temporada anterior (OR=4,79; IC95%=1,48-15,57) se asociaron con la acción de vacunarse. Conclusiones: La cobertura se encuentra en una posición intermedia comparada con otros países. Se ha de mejorar la sistemática de derivación de estos pacientes a la consulta hospitalaria de vacunas, dado que la información facilitada en ella contribuye a obtener mejores resultados.

          Translated abstract

          ABSTRACT Background: Influenza vaccination coverage in risk groups has been put forward as a healthcare quality indicator. Our objective was to determine the vaccination rate in splenectomized patients. Methods: We carried out a cross-sectional study that included splenectomized patients in the Zaragoza III Sector from January 2012 to December 2016. The patients were identified through the database of the Clinical Documentation and File Management Services of the Sector Hospital under code 41.5 of the ICD-9. The variables (sociodemographic and surgical variables, and having received information and advice regarding vaccination when they were admitted to the Immunization Unit) were obtained after a review of the patients’ records in the Specialized and Primary Care Services. The association with being vaccinated during the campaign corresponding to the surgery date was studied with bivariate analysis and multiple logistic regression model. Results: 81 patients were analyzed; 60.5% were men, with an average age of 56.3 years. Neoplasms and hematological diseases were the most common motives for surgery (64.2%). The vaccination rate was 58%. Having been advised to vaccinate (OR=6.53; 95%CI=1.88-22.69) and having been vaccinated in the previous season (OR=4.79; 95%CI= 1.48-15.57) were associated with vaccination. Conclusions: The coverage rate ranks in an intermediate position when compared with other countries. It is necessary to improve the referral system of these patients to the Immunization Unit because the information obtained by this service leads to better results.

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          Vaccination coverage and mortality after splenectomy: results from an Italian single-centre study.

          Splenectomy is a well-recognised risk factor for life-threatening overwhelming post-splenectomy infection (OPSI). To prevent OPSI, immunisations against encapsulated bacteria (S. pneumoniae, N. meningitidis, H. influenzae) and influenza virus are recommended. However, there is still a lack of uniformity and poor compliance with these recommendations. Following a local physicians' awareness campaign regarding the importance of vaccine prophylaxis of splenectomised patients, we aimed to register vaccination coverage, mortality and infection rates in all patients who underwent splenectomy at our hospital, over a six-year time span. Reasons for splenectomy, patients' compliance with vaccinations, mortality and infectious events were recorded. The reasons for splenectomy in the 216 identified patients (mean age 58.2 ± 14; M:F ratio 1.4:1) were haematologic disorders (38.8%), solid tumours (28.7%), traumatic rupture (22.7%) and other causes (9.7%). A total of 146 patients (67.6%) received at least one of the four vaccines. Overall, the mortality rate was significantly greater in unvaccinated compared to vaccinated patients (p < 0.001), although after the adjustment for the cause of splenectomy the statistical significance was lost (p = 0.085) due to the burden of solid tumour-related mortality. Among the 21 reported cases of OPSI, eight were fatal and five were potentially vaccine-preventable. Our results show that two-thirds of splenectomised patients comply with vaccine prophylaxis. Future interventional studies or ad hoc registries might overcome barriers to vaccination or intentional non-compliance.
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            Patient education and recall regarding postsplenectomy immunizations

            The purpose of this study was to determine the rates of initial vaccinations after splenectomy for trauma, assess the effectiveness of patient education on reimmunizations, and evaluate patients' utilization of their knowledge regarding immunization after discharge.
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              Pneumococcal and influenza immunization in asplenic persons: a retrospective population-based cohort study 1990-2002

              Background Splenectomy is associated with increased risk for bacteremia, due to impaired clearance of bloodborne agents and to altered phagocytosis and humoral immunity. We conducted a retrospective cohort study of patients at risk for splenectomy for a 13-year period to determine immunization coverage, and outcomes of those with and without splenectomy, and with or without receipt of influenza or pneumococcal vaccine. Methods Data were extracted from the provincial Medical Services Insurance database for insured services rendered by a physician for 1990-2002, and from the Vital Statistics Death database. The eligible cohort was selected based on diagnostic codes for hematologic conditions for which splenectomy might be considered, such as immune thrombocytopenia. Each patient was followed longitudinally from the date of first diagnosis until 31Dec2002, or death, or relocation out-of province. In addition, persons with splenectomy and no hematologic condition were identified and followed for 6 months post-surgery. Infectious illness rates per 100 person-years of observation and death rates were calculated with and without splenectomy. Death rates were determined using splenectomy status as a time-dependent covariate. The relationship between splenectomy and death according to immunization status was examined using Cox proportional hazard ratios. Results Of 38,812 persons in the cohort 427 subjects with a hematologic diagnosis had splenectomy and another 452 subjects without a hematologic diagnosis had this surgery. 72% were > 18 years of age. Pneumococcal immunization was recorded in 16.5% of asplenic patients overall, and was not associated with reduced risk of death in these persons (adjusted Hazard Ratio [HR] = 1.07, 95% CI 0.70 - 1.65). Influenza immunization was recorded in 53.1% of asplenic patients overall, and was associated with reduced risk of death (adjusted HR = 0.46, 0.33-0.62). No pneumococcal or influenza immunization was recorded in patients with a hematologic diagnosis without splenectomy. Infectious illness visits were higher among all patients who had a splenectomy than among those without a splenectomy (151 visits/100 person-years of observation in the post-splenectomy period vs. 120 visits/100 person-years; p < 0.0001). Conclusions In asplenic patients, influenza immunization is associated with a 54% reduced risk of death compared to unimmunized asplenic persons; no reduction in risk was demonstrated with (polysaccharide) pneumococcal vaccine. Vaccine coverage in the entire cohort was less than routinely recommended. Improved delivery of infection prevention programs to this population is warranted. Conjugate pneumococcal vaccines should be urgently studied in this immunocompromised population.
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                Author and article information

                Journal
                resp
                Revista Española de Salud Pública
                Rev. Esp. Salud Publica
                Ministerio de Sanidad, Consumo y Bienestar social (Madrid, Madrid, Spain )
                1135-5727
                2173-9110
                2019
                : 93
                : e201911095
                Affiliations
                [3] Zaragoza orgnameGrupo de Investigación en Servicios Sanitarios de Aragón España
                [1] Zaragoza orgnameHospital Clínico Universitario Lozano Blesa orgdiv1Servicio de Medicina Preventiva y Salud Pública Spain
                [2] Zaragoza Aragón orgnameUniversidad de Zaragoza orgdiv1Medicina Preventiva y Salud Pública orgdiv2Departamento de Microbiología Spain
                Article
                S1135-57272019000100220 S1135-5727(19)09300000220
                ac6ccb34-8d20-404b-b895-ca0114a2a7a3

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 International License.

                History
                : 26 July 2019
                : 16 September 2019
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 16, Pages: 0
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                SciELO Public Health

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                Esplenectomía,Gripe,Cobertura de vacunación,Splenectomy,Influenza,Vaccination coverage

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