[Strategy for planning and execution of a large-scale SARS-CoV-2 seroprevalence study on teaching hospital workers during a pandemic situation]. / Estrategia de planificación y ejecución de un estudio a gran escala de seroprevalencia de SARS-CoV-2 en trabajadores de un hospital universitario durante una situación de pandemia.

OBJECTIVE: To describe the planning and execution process of a massive seroprevalence study for SARS-CoV-2 in professionals of the Hospital Universitario Fundación Alcorcón (HUFA) (Spain). METHODS: A description is presented of the plan designed and developed at the HUFA for the execution of the extraction of the samples for serology from all the professionals who worked in the hospital between 14 and 29 April 2020. A descriptive analysis of the participation of the professionals in the study is carried out. Extraction areas, health personnel, and execution times were planned. A total of 2326 extractions were assigned to health personnel, the remaining extractions were assigned to workers from external companies. RESULTS: A total of 2641 workers (90.5%) out of 2918 candidates participated in the study. The professional category most analysed was nursing with 28.3% (n = 590). The percentage of compliance with schedule planning was 28.6%. Up to a maximum of 298 daily extractions were planned. The busiest day was the 4th day of the study with 399 extractions. CONCLUSIONS: The organising of such a large study, with a 100% coverage of those who worked in the hospital, and with such a great response from the workers involved, has led to obtaining results of high reliability in the seroprevalence study carried out. Although the percentage of participation was very high, the level of compliance with the planning was low.

Estrategia de planificación y ejecución de un estudio a gran escala de seroprevalencia de SARS-CoV-2 en trabajadores de un hospital universitario durante una situación de pandemia / Strategy for planning and execution of a large-scale SARS-CoV-2 seroprevalence study on teaching hospital workers during a pandemic situation

OBJETIVO: Describir el proceso de planificación y ejecución de un estudio masivo de seroprevalencia para SARS-CoV-2 en los profesionales del Hospital Universitario Fundación Alcorcón (HUFA) (España). MÉTODO: Se efectúa una descripción del plan diseñado y desarrollado en el HUFA para la realización de las extracciones de las muestras para serología en el total de los profesionales que prestan servicio en el hospital, entre el 14 y el 29 de abril del 2020. Se lleva a cabo un análisis descriptivo de la participación de los profesionales en el estudio. De igual manera, se planificaron zonas de extracción, personal sanitario y tiempos de ejecución. Se asignaron 2.326 extracciones a personal sanitario, el resto fueron a trabajadores de las empresas externas. RESULTADOS: Participaron en el estudio 2.641 trabajadores (90,5%) de 2.918 candidatos. La categoría profesional que más se analizó globalmente fue la de enfermería con un 28,3% (n = 590). El porcentaje de cumplimiento de la organización de los horarios fue del 28,6%. Se planificó hasta un máximo de 298 extracciones diarias. El día con más afluencia fue el cuarto con 399 extracciones. CONCLUSIONES: El hecho de organizar un dispositivo tan grande con un alcance al 100% de los trabajadores que prestan servicio en el hospital, y con una respuesta tan mayoritaria por parte de ellos, ha permitido que el estudio de seroprevalencia realizado obtenga unos resultados con alta fiabilidad. Aunque el porcentaje de participación fue muy alto, el grado de cumplimiento de la planificación fue reducido

OBJECTIVE: To describe the planning and execution process of a massive seroprevalence study for SARS-CoV-2 in professionals of the Hospital Universitario Fundación Alcorcón (HUFA) (Spain). METHODS: A description is presented of the plan designed and developed at the HUFA for the execution of the extraction of the samples for serology from all the professionals who worked in the hospital between 14 and 29 April 2020. A descriptive analysis of the participation of the professionals in the study is carried out. Extraction areas, health personnel, and execution times were planned. A total of 2326 extractions were assigned to health personnel, the remaining extractions were assigned to workers from external companies. RESULTS: A total of 2641 workers (90.5%) out of 2918 candidates participated in the study. The professional category most analysed was nursing with 28.3% (n = 590). The percentage of compliance with schedule planning was 28.6%. Up to a maximum of 298 daily extractions were planned. The busiest day was the 4th day of the study with 399 extractions. CONCLUSIONS: The organising of such a large study, with a 100% coverage of those who worked in the hospital, and with such a great response from the workers involved, has led to obtaining results of high reliability in the seroprevalence study carried out. Although the percentage of participation was very high, the level of compliance with the planning was low