A bias by absence
Publication bias in meta-analysis. Publication bias, characteristic of meta-analyzes, is described. Some of the methods to assess the existence of the risk of bias are shown.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Read MoreA bias by absence
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.
Censorship
Survival tables and censored data. We describe the methodology of preparing survival tables and the treatment of censored data in this type of study with time to event variables.
Simplifying the impact
Other impact numbers. Other impact number, absolute and relative impact numbers, used to assess the results of observational studies are reviewed.