How to avoid bias in systematic reviews of observational studies

This article aims at critically reviewing the literature about systematic reviews of observational studies, emphasizing the errors that can affect this type of study design and possible strategies to overcome these errors. This is an integrative literature review whose search was conducted in the databases States National Library of Medicine, Scientific Electronic Library Online and Google Scholar. The following descriptors were used: review, bias (epidemiology) and observational studies as the subject, including relevant books and documents which were consulted. Data collection was conducted between June and July 2016. The most known errors present in the design of systematic reviews were those related to the selection and publication. Although this type of study is subject to possible errors, preventive measures used during the planning of systematic reviews and even during and after their implementation can help ensure scientific rigor. This literature can serve as an important tool for the development and interpretation of systematic reviews of observational studies.RESUMO Embora as revis ões sistemáticas tenham inúmeras vantagens, eles são vulneráveis a vieses que podem mascarar os verdadeiros resultados do estudo e, portanto, devem ser interpretados com cautela. A proposta deste artigo é revisar criticamente a literatura acerca das revisões sistemáticas de estudos observaci onais, enfatizando os erros que podem afetar este tipo de desenho de estudo e as possíve...
Source: Revista CEFAC - Category: Speech-Language Pathology Source Type: research