In LCBC-UiO/Questionnaires: Package with functions to calculate components and sums for LCBC questionnaires

Column naming

The easiest is to have data coded as in the NOAS, as this will let you use default values for the arguments. The column names in the NOAS all start with gds_ and then are followed by a two-digit numbering of the question:

gds_01,
gds_02,
gds_03,
...
gds_28,
gds_29,
gds_30

If your data is coded differently, a consistent naming scheme should help you use the functions anyway.

Data values

Each row of data should belong to a single answer to the entire questionnaire. Meaning if you have multiple answers to the questionnaire over time, these should be placed in another row, duplicating the participant ID, together with a column indicating the timepoint the data was collected in. Data values are binary yes and no answers to the GDS. While the functions are made in such a way that any type of binary coding works well, the default is set to be yes = 1, no = 0. These can be altered by applying the gds_values functions to the other functions asking for the coding schema.

LCBC-UiO/Questionnaires documentation built on July 18, 2023, 6:45 p.m.