Publication bias in oral and maxillofacial surgery journals: An observation on published controlled trials

Productividad y calidad metodológica de artículos clínicos en cirugía oral y maxilofacial en Chile: Período 2001-2012

“…En relación al NE, no es distinto al descrito a nivel mundial en las disciplinas quirúrgicas en general 4 o en la COMF en particular [6][7][8] ; con una gran concentración a nivel de reporte de casos de patologías de baja prevalencia, hallazgos clínicos, complicaciones o resultados asociados a una técnica quirúrgica poco convencional. Si bien se observan ensayos clínicos dentro de los resultados, éstos carecen de conceptos metodológicos claros como: definición del diseño, estimación del tamaño de la muestra, asignación aleatoria de los grupos en estudio, presencia de enmascaramiento, etc.…”

Level of evidence and geographic origin of articles published in Chilean dental journals.

“…This has been demonstrated worldwide in specialties such as maxillofacial surgery [8][9][10] and ratified in Chile for the same specialty by Aravena et al 5 . As cited by Lau and Samman 8 , there are no level 1 publications in Chilean journals and only one out of five is level 2.…”

The role of the funnel plot in detecting publication and related biases in meta-analysis

“…[9][10][11][12] Dental health researchers might quite understandably think of the funnel plot and associated statistical tests as tools to detect only publication bias. A funnel plot can be asymmetric for a number of reasons and statistical tests to assess reporting bias have their limitations.…”

“…10 A similar study of journals in maxillofacial surgery came up with a figure of 77%. 11 Like other health care domains, publication bias is clearly a problem in dental research. [9][10][11][12] The funnel plot as a tool to detect publication bias…”