Example Data on FEV1

Source: R/data.R

[Stable]

fev_data

Format

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.

  • VISITN: integer order of the visit.

  • VISITN2: coordinates of the visit for distance calculation.

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).