Deduplicação para redução de cumplicidade na base de dados do cartão nacional de saúde do SUS: uma análise da versão 5 do sistema CADSUS

Abstract

The National Health Card (CNS) refers toto a national database with records of individuals who had contact with health services or actions offered by the Unified Health System (SUS) and data from the professionals who perform these services and actions. Its purpose is to univocally identify these individuals. Versions of the information systems that maintain this database have been made available since 1999, with distinct strategies and technologies of solution. This entailed a high volume of duplicate records. In the writing of this work, the National Health Card database had about 286 million individuals registered as alive. This represents a volume over 208 million of the Brazilian population estimated by the Brazilian Institute of Geography and Statistics (IBGE). As a fundamental basis for the implementation of the Brazilian e-Health strategy, it is important to treat duplicities to increase the quality of monitoring and to enable public health policies to be formulated with greater assertiveness and efficiency. This paper presents a contextualization of the Unified Health System, about the National Health Card and its information system. In addition, it discusses what the deduplication process is and how it runs on the basis of CNS. The main objective of this work was to analyze the efficiency of the duplication treatment process implemented in version 5 of the CADSUS system. This system, whose quoted version was published in 2014, is responsible for maintaining the National Health Card database. For this analysis, two profiling processes were performed at different times, one in November 2017 and another in February 2019, to evaluate the evolution of the quantity of the records during this period and the quality of the information of the attributes used in the process of deduplication of the Card.