One row of data should refer to a single questionnaire answered, and as such, if a person has answered multiple times, these should appear on separate rows with columns identifying ID and time point per observation.

Column names

For ease, we recommend naming the columns in a consistent way, so the functions in this package become easier to use. The LCBC database follows a naming scheme that prefixes all columns with ehi_ and ends with a zero-padded double digit indicator of the question number.

Data values

The cell values in the data should be coded from -2 through 0 to 2, and there should be a single value per question.

|value|category | |--: |:-- | | -2 | Left hand dominance | | -1 | Left hand preference | | 0 | No preference | | 1 | Right hand preference | | 2 | Right hand dominance |



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