Calculates the difference between proportions and standard error according to Wald

Source: R/propdiff_wald.R

propdiff_wald Calculates the difference between proportions and standard error according to Wald and degrees of freedom to be used in function with.miceafter.

propdiff_wald(y, x, formula, data, strata = FALSE)

Arguments

y

0-1 binary response variable.

x

0-1 binary independent variable.

formula

A formula object to specify the model as normally used by glm.

data

An objects of class milist, created by df2milist, list2milist or mids2milist.

strata

If TRUE the proportion, se and n of each group is provided. Default is FALSE. Has to be used in combination with function pool_propdiff_wilson

Value

The difference between proportions, standard error and complete data degrees of freedom (dfcom) as n-1.

Author

Martijn Heymans, 2021

Examples


imp_dat <- df2milist(lbpmilr, impvar="Impnr")
ra <- with(imp_dat, expr=propdiff_wald(Chronic ~ Radiation))

# proportions in each subgroup
imp_dat <- df2milist(lbpmilr, impvar="Impnr")
ra <- with(imp_dat, expr=propdiff_wald(Chronic ~ Radiation, strata=TRUE))