VitD: Data from a cohort study on Vitamin D and mortality.
In ivtools: Instrumental Variables

Description Usage Format References

This dataset originates from a real cohort study on Vitamin D and mortailty, described by Martinussen et al (2017). However, to allow public availability the data were slightly mutilated before inclusion in the ivtools package.

1	data(VitD)

The dataset contains the following variables:

age: age at baseline.
filaggrin: binary indicator of whether the subject has mutations in the filaggrin gene.
vitd: vitamin D level at baseline, measured as serum 25-OH-D (nmol/L).
time: follow-up time.
death: indicator of whether the subject died during follow-up.