derive_var_ady {admiral}R Documentation

Derive Analysis Study Day

Description

[Deprecated]

This function is deprecated, please use derive_vars_dy() instead.

Adds the analysis study day (ADY) to the dataset, i.e., study day of analysis date.

Usage

derive_var_ady(dataset, reference_date = TRTSDT, date = ADT)

Arguments

dataset

Input dataset

The columns specified by the reference_date and the date parameter are expected.

reference_date

The start date column, e.g., date of first treatment

A date or date-time object column is expected.

Refer to derive_vars_dt() to impute and derive a date from a date character vector to a date object.

The default is TRTSDT.

date

The end date column for which the study day should be derived

A date or date-time object column is expected.

Refer to derive_vars_dt() to impute and derive a date from a date character vector to a date object.

The default is ADT

Details

The study day is derived as number of days from the start date to the end date. If it is non-negative, one is added. I.e., the study day of the start date is 1.

Value

The input dataset with ADY column added

Author(s)

Stefan Bundfuss


[Package admiral version 0.8.4 Index]