calc_DY

Utilizes the DY method from the SDTM spec: <code>--DTC-RFSTDTC+1</code> if <code>--DTC</code> is on
or after RFSTDTC. <code>--DTC-RFSTDTC</code> if <code>--DTC</code> precedes <code>RFSTDTC</code>. This
function can also be used for the ENDY method from the spec which has the
same logic.

Provides a set of tools to assist statistical programmers
in validating Study Data Tabulation Model (SDTM) domain data sets.
Statistical programmers are required to validate that a SDTM data set domain
has been programmed correctly, per the SDTM Implementation Guide (SDTMIG) by
'CDISC' (<https://www.cdisc.org/standards/foundational/sdtmig>),
study specification, and study protocol using a process called double
programming. Double programming involves two different programmers
independently converting the raw electronic data cut (EDC) data into a SDTM
domain data table and comparing their results to ensure accurate
standardization of the data. One of these attempts is termed 'production'
and the other 'validation'. Generally, production runs are the official
programs for submittals and these are written in 'SAS'. Validation runs can
be programmed in another language, in this case 'R'.

Stephen Knapp

sdtmval

Validate SDTM Domains

calc_DY function

<dl><dt>tbl</dt>
<dd>a data frame with the date column <code>RFSTDTC</code> and the column
specified by the <code>DTC_col</code> argument</dd>
<dt>DY_col</dt>
<dd>string, the name of the new DY column to create</dd>
<dt>DTC_col</dt>
<dd>string, the column in <code>tbl</code> which has the dates for which to
calculated the DY value; should either already have a date class or be a
character vector in the format YYYY-MM-DD</dd>
<dt>RFSTDTC</dt>
<dd>a string, the column to use for <code>RFSTDTC</code>, default is
<code>"RFSTDTC"</code>; should either already have a date class or be a
character vector in the format YYYY-MM-DD</dd></dl>

Arguments

Calculate a DY variable (day of study) — calc_DY

<dl>

<dt>tbl</dt>
<dd>a data frame with the date column <code>RFSTDTC</code> and the column
specified by the <code>DTC_col</code> argument</dd>


<dt>DY_col</dt>
<dd>string, the name of the new DY column to create</dd>


<dt>DTC_col</dt>
<dd>string, the column in <code>tbl</code> which has the dates for which to
calculated the DY value; should either already have a date class or be a
character vector in the format YYYY-MM-DD</dd>


<dt>RFSTDTC</dt>
<dd>a string, the column to use for <code>RFSTDTC</code>, default is
<code>"RFSTDTC"</code>; should either already have a date class or be a
character vector in the format YYYY-MM-DD</dd>

</dl>

calc_DY: Calculate a DY variable (day of study)

Description

Usage

Value

Arguments

See Also

Examples