A tibble with 800 rows and 7 variables:
USUBJID: subject ID.
AVISIT: visit number.
ARMCD: treatment, TRT or PBO.
RACE: 3-category race.
SEX: sex.
FEV1_BL: FEV1 at baseline (%).
FEV1: FEV1 at study visits.
WEIGHT: weighting variable.
Source
This is an artificial dataset.
Note
Measurements of FEV1 (forced expired volume in one second) is a measure
of how quickly the lungs can be emptied. Low levels of FEV1 may indicate
chronic obstructive pulmonary disease (COPD).
![[Experimental]](figures/lifecycle-experimental.svg)