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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.

Usage

epilep

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.