Epiliptic seizure counts from the Randomized Progabide Trial
The data consists of 59 subjects from the randomized progabide trial.
base:baseline epiliptic seizure counts
trt:the indicator for treatment (1=progabide; 0=control)
age:baseline age for each subject
y1:epiliptic seizure counts in the first week
y2:epiliptic seizure counts in the second week
y3:epiliptic seizure counts in the third week
y4:epiliptic seizure counts in the forth week
The outcome is the count number of epiliptic seizures in each of four consecutive two-week intervals, and the variables recorded include baseline epiliptic seizure counts in an eight-week interval prior to the treatment assignment, the indicator for treatment (1=progabide; 0=control), and baseline age.
Thall PF, and Vail SC. Some covariance models for longitudinal count data with overdispersion. Biometrics 1990; 46: 657-671.