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Secondary & linked variables

This section contains two types of data:

  1. Secondary variables, i.e. variables derived (typically by coding or calculation) from primary variables collected directly from Lifelines participants.
  2. Linked variables, i.e. that were not collected by Lifelines but are obtained from another data source and linked to Lifelines participants (typically via postal codes).

The following secondary variables are available:

The following linked variables are available:

The following secondary variables are listed to be added to the catalogue in the future:

  • Asthma definition
  • Cancer coding
  • COPD definition
  • Ethnicity
  • Fibromyalgia diagnosis
  • Glaucoma definition using vision variables
  • Prevalent diabetes (type 1, type 2, and other type) and incident type 2 diabetes
  • Respitory symptoms and allergy
  • Validation of blood pressure measurements and the hypertension definition and creation of derivates
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secondary_linked_variables.txt · Last modified: 2023/01/30 14:26 by flip