Description

The dataset has the number of epiliptic seizures in each of four two-week intervals,and in a baseline eight-week inverval, for treatment and control groups with a total of 59 individuals.

Usage

Format

This data frame contains the following columns:

y1

the number of epiliptic seizures in the 1st 2-week interval

y2

the number of epiliptic seizures in the 2nd 2-week interval

y3

the number of epiliptic seizures in the 3rd 2-week interval

y4

the number of epiliptic seizures in the 4th 2-week interval

trt

an indicator of treatment

base

the number of epilitic seizures in a baseline 8-week interval

age

a numeric vector of subject age

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., Liang, K.Y., and Zeger, S.L. (1994) Analysis of Longitudinal Data. Clarendon Press.

See Also

seizure (geepack)