Protocol registration improves reporting quality of systematic reviews in dentistry

• DOI: 10.1186/s12874-020-00939-7
• Publication Date: 2020-03-11T08:02:49Z
• Authors: Mateus Bertolini ...; Bernardo Antônio ...; Rafaela Bassani; Gabriel Kalil Roc...; Rafael Sarkis-Onofre
• Keywords: Reporting bias; Trial registration

The aims of this study were to assess whether the previous registration a systematic review (SR) is associated with improvement quality report SRs and SR reduced outcome reporting bias.We performed search in PubMed for dentistry indexed 2017. Data related characteristics extracted. We analyzed if 21 included was prospective protocols or previously established protocol. association between registering protocols, funding number studies versus bias tested via multivariable logistic regression.We 495 SRs. One hundred 62 (32.7%) reported protocol working from Thirteen described statistically significant registered that not. Publication assessment Report participants showed highest effects favoring register (RR 1.59, CI 95% 1.19-2.12; RR 1.58, 1.31-1.92 respectively). Moreover, Registration not significantly linked articles' statistical significance (OR 0.96, 0.49-1.90).There positive influence final dentistry. However, we did observe an reduction bias.