Little ado about too much
Critical appraisal of meta-analysis. Guidelines for critical reading of a meta-analysis are proposed. The main points dealt with by the PRISMA declaration are also described.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Statistics
Achilles and Effects Forest
Publication bias. We describe publication bias in meta-analysis and the most used methods that are empoyed for its study, both graphical and numerical.
Apples and pears
Study of heterogeneity in meta-analysis. Numerical (Q, I, H) and graphical methods (Galbraith and L’Abbé) for the study of heterogeneity of the primary meta-analysis studies.
Three feet of a cat
Collinearity in lineal multiple regression. Collinearity in multiple regression is described, as well as the two parameters for its study, the increase and the inflation factors of variance.
In search of causality
Discontinuity regression. Discontinuity regression is a quasi-experimental design that allows causal inference to be made in the absence of randomization.