Tag Heterogeneity

Sin categoría, Statistics

The polysemy of Q

Cochran's Q is a widely used measure to detect heterogeneity between primary studies in a meta-analysis. Its statistical properties and hypothesis testing are reviewed. Finally, other measures calculated from this value are described, such as the I2 statistic and the H2 statistic, frequently used to quantify the intensity of heterogeneity between studies.

Manuel Molina
04/16/2024

Critical appraisal, Statistics

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.

Manuel Molina
10/30/2018

Sin categoría, Statistics

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.

Manuel Molina
05/29/2018

Critical appraisal

Take care of the pennies, and the pounds will take care of themselves

Combining studies in meta-analysis. Combining studies in meta-analysis uses a weighting model. The two most used are the fixed effect model and the random effects model.