| breslow.dat {RobStatTM} | R Documentation |
Breslow Data
Description
Patients suffering from simple or complex partial seizures were randomized to receive either the antiepileptic drug progabide or a placebo. At each of four successive post randomization clinic visits, the number of seizures occuring over the previous two weeks was reported.
Usage
data(breslow.dat)
Format
An object of class "data.frame".
Details
Description: A data frame with 59 observations on the
following 12 variables: ID: an integer value
specifying the patient identification number; Y1:
an integer value, the number of seizures during the first
two week period; Y2: an integer value, the number of
seizures during the second two week period; Y3: an integer
value, the number of seizures during the third two week period.
Y4: an integer value, the number of seizures during the
fourth two week period; Base: an integer value giving
the eight-week baseline seizure count; Age: an integer
value giving the age of the parient in years; Trt:
the treatment: a factor with levels placebo and progabide;
Ysum: an integer value, the sum of Y1, Y2, Y3 and Y4;
sumY: an integer value, the sum of Y1, Y2, Y3 and Y4;
Age10: a numeric value, Age divided by 10; Base4:
a numeric value, Base divided by 4.
Format: Numeric, 59 rows and 12 columns.
Source
Breslow, N. E., and Clayton, D. G. (1993), "Approximate Inference in Generalized Linear Mixed Models," Journal of the American Statistical Association, Vol. 88, No. 421, pp. 9-25.
Thrall, P. F., and Vail, S. C. (1990), "Some Covariance Models for Longitudinal Count Data With Overdispersion," Biometrics, Vol. 46, pp. 657-671.
Examples
data(breslow.dat)