Longitudinal epilepsy data from Leppik et al. (1987) . This documentation is based on Chapter 11.3 of Skrondal and Rabe-Hesketh (2004) , where the dataset is used.
Format
epilep A data frame with 236 rows and 7 columns:
- subj
Subject ID.
- y
Number of seizures.
- treat
Dummy variable for treatment group.
- visit
Time at visit.
- v4
Dummy for visit 4.
- lage
Logarithm of age.
- lbas
Logarithm of a quarter of the number of seizures in the eight weeks preceding entry into the trial.
References
Leppik IE, Dreifuss FE, Porter R, Bowman T, Santilli N, Jacobs M, Crosby C, Cloyd J, Stackman J, Graves N, Sutula T, Welty T, Vickery J, Brundage R, Gates J, Gumnit RJ, Gutierrez A (1987).
“A Controlled Study of Progabide in Partial Seizures: Methodology and Results.”
Neurology, 37(6), 963–963.
ISSN 0028-3878, 1526-632X, doi:10.1212/WNL.37.6.963
.
Skrondal A, Rabe-Hesketh S (2004).
Generalized Latent Variable Modeling, Interdisciplinary Statistics Series.
Chapman and Hall/CRC, Boca Raton, Florida.
See also
Other datasets:
cognition,
diet,
hsced,
latent_covariates,
latent_covariates_long,
lifespan,
mresp,
mresp_hsced