summarize_continuous: Calculates and formats summary statistics for continuous data
In ddsjoberg/gtsummary-v0.1: Presentation-Ready Data Summary Tables

Calculates and formats summary statistics for continuous data

1 2	summarize_continuous(data, variable, by, digits, var_label, stat_display, missing)

`data`	data frame
`variable`	Character variable name in `data` that will be tabulated
`by`	Character variable name in `data` that Summary statistics for `variable` are stratified
`digits`	integer indicating the number of decimal places to be used.
`var_label`	string label
`stat_display`	String that specifies the format of the displayed statistics. The syntax follows `glue` inputs with n, N, and p as input options.
`missing`	whether to include `NA` values in the table. `missing` controls if the table includes counts of `NA` values: the allowed values correspond to never (`"no"`), only if the count is positive (`"ifany"`) and even for zero counts (`"always"`). Default is `"ifany"`.