asthma {asbio} | R Documentation |
This dataset was used by Littell (2002) to demonstrate repeated measures analyses. The effect of two asthma drugs and a placebo were measured on 24 asthmatic patients. Each patient was randomly given each drug using an approach to minimizet carry-over effects (Section 15.6) Forced expiratory volume (FEV1), the volume of air that can be expired after taking a deep breath in one second, was measured. FEV1 was measured hourly for eight hours following application of the drug. A baseline measure of FEV1 was also taken 11 hours before application of the treatment.
data(asthma)
The dataframe has 11 columns:
"a"
= a standard drug treatment, "c"
= the drug under development, and "p"
= a placebo.Littell, R. C., Stroup, W. W., and R. J. Fruend (2002) SAS for linear models. John Wiley and Associates.