There are three types of analyses: descriptive analyses, univariate analyses and multivariate (or multivariable) analyses Descriptive analyses are used to describe the data, and are useful for detecting problems Univariate and multivariate analyses allow statistical comparisons (obtaining a p-value), and only multivariate analyses allow confounding factors to be taken into account Descriptive analyses Before...

It is sometimes surprising not to be able to carry out a multivariate analysis because the number of subjects is too small while the file contains several hundred observations (patients, subjects). Linear regressions For linear regressions, i. e. multivariate analyses for which the outcome variable is numerical, it is necessary to have...