Stratifier inside of tableone call leads to NAs, should be automatically removed

[timtreis]

Issue description

A naive 'tableone()` call leads to NAs being introduced into the rendered table.

tableone(data, strata = "Sex", 
         title = TITLE, datasource = DATASOURCE)

Therefore the strata needs to be manually removed before rendering the table.

get_tableone(data, strata = "Sex") %>% 
  filter(variable != "Sex") %>% 
  render(title = TITLE, datasource = DATASOURCE)

This should be done automatically.

[rebecca-albrecht]

Actually I just realized that the stratifier is not included when we set the parameter overall to F. I seems that the stratifier is only in there because of the Total column. So maybe this is even what we want?

[timtreis]

Implement na.action for removal of stratifier that leads to NAs