madras {lnMLE} | R Documentation |
Madras Longitudinal Schizophrenia Study data
Description
Data from a study of the natural history of schizophrenia. First-episode patients had disease symptoms recorded monthly for up to 12 months following initial hospitalization.
Usage
data(madras)
Format
A matrix containing 8 variables (columns) and 922 observations (rows) measured on a total of 86 patients.
id:a vector that identifies the clusters which correspond to the binary response vector given by y
.
y:the binary response vector for presence or absence of schizophrenic symptoms
month:symptom measurements were collected over the course of 12 months (0,...,11) following the initial hospitalization for schizophrenia
age:a binary indicator for age at onset (1 = age < 20 years old)
gender:0 = male, 1 = female
monthXage:an interaction term (cross product) of month and age
monthXgender:an interaction term (cross product) of month and gender
initial:an indicator variable for month = 1
allowing alpha1
to be used in lag-2 transition models for both the second-order model and the initial state
References
Thara, R., Henrietta, M., Joseph, A., Rajkumar, S., and Eaton, W. (1994). Ten year course of schizophrenia - The Madras Longitudinal Study. Acta Psychiatrica Scandinavica {bf 90}, 329-336.
[Package
lnMLE version 1.0-1
Index]