BIB: tips and FAQs

BIB: tips and FAQs#

Last modified: 14 Oct 2026

Useful tips for working with BIB data.

Distinguishing betweeen mothers and children in the cohort

The variable bib_age_y enables researchers to distinguish between the original mothers and their children in the cohort. It refers to the age at which the original participants joined the cohort.

  • If bib_age_y is 0 then the participant is a child of one of the original participants

  • If bib_age_y is not 0 then the participant is an original participants (“a mother”)