epilepsy {gcmr}R Documentation

Epilitic Seizures Data

Description

Longitudinal study on epilitic seizures (Thall and Vail, 1990; Diggle et al. 2002). The data consist into 59 individuals with five observations each: The baseline eight-week interval and measurements collected at subsequent visits every two-week.

Usage

data(epilepsy)

Format

id patient's id .
age patient's age.
trt indicator if the patient is treated with progabide (1) or with placebo (2).
counts number of epileptic seizures.
time observation period in weeks (8 for baseline and 2 for subsequent visits).
visit indicator if observation at baseline (0) or subsequent visit (1).

Source

Thall, P.F. and Vail S.C. (1990). Some covariance models for longitudinal count data with overdispersion. Biometrics 46, 657–671.

References

Diggle, P.J., Heagerty, P., Liang, K.Y. and Zeger, S.L. (2002). Analysis of Longitudinal Data. Oxford: Oxford University Press. Second edition.


[Package gcmr version 1.0.3 Index]