THRESHOLD MODELS IN A METHADONE PROGRAM-EVALUATION

Authors
SAEI A WARD J MCGILCHRIST CA
Citation
A. Saei et al., THRESHOLD MODELS IN A METHADONE PROGRAM-EVALUATION, Statistics in medicine, 15(20), 1996, pp. 2253-2260
Citations number
17
Categorie Soggetti
Statistic & Probability","Medicine, Research & Experimental","Public, Environmental & Occupation Heath","Statistic & Probability","Medical Informatics
Journal title
Statistics in medicine → ACNP
ISSN journal
02776715
Volume
15
Issue
20
Year of publication
1996
Pages
2253 - 2260
Database
ISI
SICI code
0277-6715(1996)15:20<2253:TMIAMP>2.0.ZU;2-Z
Abstract
The degree of non-compliance with a methadone programme is such that a zero is often recorded as the response variable. Such outcome variabl es cannot be transformed to normality in order to investigate a regres sion relationship between the response variable and various risk or tr eatment variables. The presence of a random effect as well in this reg ression causes added difficulty in the analysis. We show here that use of threshold models can provide a satisfactory solution to both these problems.