breslow.dat | R Documentation |
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.
data(breslow.dat)
An object of class "data.frame"
.
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.
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.
data(breslow.dat)
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