Notas metodológicas
Published on 6 de junio de 2023 | http://doi.org/10.5867/medwave.2023.05.2704
Approaching the body of evidence: Key concepts of Overviews
Representation of overlapping primary studies within an overview.
RCT: Randomized Clinical Trial. SR: Systematic Review.
Green circle: patients in whom treatment was beneficial.
Red circle: patients in whom treatment was not beneficial.
It could be erroneously concluded that drug A is superior to drug B because RCT 3 is overrepresented as it is included in several SR, thus overestimating its real effect.
Source: Prepared by the authors.
Green circle: patients in whom treatment was beneficial.
Red circle: patients in whom treatment was not beneficial.
It could be erroneously concluded that drug A is superior to drug B because RCT 3 is overrepresented as it is included in several SR, thus overestimating its real effect.
Source: Prepared by the authors.