title: [Quality assurance of data collection and data processing in epidemiologic study data].
abstract: Quality assurance of the data generating processes in epidemiologic studies is a prerequisite for the internal validity of study results. This paper presents practical aspects of such a quality assurance system pertaining to the planning, data gathering, data entry and data processing phase of a study. It is concerned with data obtained in the framework of a project rather than with data accumulating continuously in private practices, research institutes or veterinary faculties. During the planning phase of a project, standard operating protocols should be developed that assure a reliable performance of observation, coding and data entry. The data base structure, consisting of tables, input validation rules and queries, should be predefined and well documented. A data safety concept will provide the necessary integrity, physical safety and availability of the data. The paper presents technical solutions to common data processing problems with emphasis on re-coding and relational data base facilities (Microsoft-ACCESS) using a hypothetical study on risk factors for mastitis.
authors.affiliation: Fachrichtung Internationale Tiergesundheit, Institut für Parasitologie und Internationale Tiergesundheit, Freie Universität Berlin. mgreiner@vetmed.fu-berlin.de
authors.forename: M
authors.initials: M
authors.lastname: Greiner
authors.forename: M P
authors.initials: MP
authors.lastname: Baumann
authors.forename: K H
authors.initials: KH
authors.lastname: Zessin
mesh_terms: D000818:Animals; D003625:Data Collection / Q000592:standards*; D001330:Electronic Data Processing / Q000592:standards*; D016021:Epidemiologic Studies; D008413:Mastitis / Q000453:epidemiology / Q000662:veterinary; D011786:Quality Control; D012107:Research Design / Q000592:standards*; D012307:Risk Factors
vernacular_title: Qualitätssicherung bei der Erhebung und Aufarbeitung von epidemiologischen Studiendaten.