coding                  combines two or more surrogate/auxiliary
                        variables into a vector
ectopic                 The Ectopic Pregnancy Dataset
meanscore               Mean Score Method for Missing Covariate Data
                        in Logistic Regression Models
ms.nprev                Logistic regression of two-stage data using
                        second stage sample and first stage sample
                        sizes or proportions (prevalences) as input
simNA                   Simulated dataset for illustrating the
                        meanscore function
