Codebook baseline measurements

How to use the codebook pages

See menu on the right to find variables and codebooks by category. Within each category, the variables are grouped by topic.

Explanation of the codebook tables

Variable Name: name of the variable as used in the NEO database

Label: description of the variable

Format / Categories: describes the format of the variable (e.g. string, numeric, date). In case of a categorical numeric variable, it is described as “Cat /” + the value labels of the individual categories.

Source: source of the variable, i.e., how the data was collected. For example, ‘GenQ’ = general questionnaire that was completed at home. Also see this page for a complete list of baseline data collection methods.