library(vcdExtra)CMHtest for assication between ordered categorical variables.
library(DescTools)To get the BreslowDayTest
library(pwr)Various power calculations
library(nnet)To get multinom: Baseline logit model for unordered categorical response.
library(MASS)polr for cumulative logit model.
library(gmodels)estimable to estimate contrasts.
library(polycor)For polychor
library(psych)For cohen.kappa
library(elrm)elrm for exact logistic regression
library(poLCA)poLCA for Latent Class Analysis
library(survival)clogist to do conditional logistic regession