M
McLellan At
Researcher at University of Pennsylvania
Publications - 100
Citations - 13311
McLellan At is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Substance abuse & Methadone. The author has an hindex of 47, co-authored 100 publications receiving 13107 citations. Previous affiliations of McLellan At include United States Department of Veterans Affairs & Veterans Health Administration.
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Journal ArticleDOI
An improved diagnostic evaluation instrument for substance abuse patients. The Addiction Severity Index.
TL;DR: The use of the ASI is suggested to match patients with treatments and to promote greater comparability of research findings, suggesting the treatment problems of patients are not necessarily related to the severity of their chemical abuse.
Journal ArticleDOI
New data from the Addiction Severity Index. Reliability and validity in three centers.
McLellan At,Lester Luborsky,John S. Cacciola,Jeffrey Griffith,Frederick J. Evans,Harriet Linton Barr,Charles A. O'Brien +6 more
TL;DR: The overall conclusion is that the ASI is a reliable and valid instrument that has a wide range of clinical and research applications, and that it may offer advantages in the examination of important issues such as the prediction of treatment outcome, the comparison of different forms of treatment, and the “matching” of patients to treatments.
Journal ArticleDOI
Predicting Response to Alcohol and Drug Abuse Treatments: Role of Psychiatric Severity
TL;DR: Findings support the effectiveness and specificity of different substance abuse treatments, suggest methodologic reasons for the lack of similar findings in previous studies, and demonstrate the importance of psychiatric factors in substance abuse treatment.
Journal ArticleDOI
The Effects of Psychosocial Services in Substance Abuse Treatment
TL;DR: The addition of basic counseling was associated with major increases in efficacy; and the addition of on-site professional services was even more effective.
Journal Article
Human immunodeficiency virus seroconversion among intravenous drug users in- and out-of-treatment: an 18-month prospective follow-up
David S. Metzger,George E. Woody,McLellan At,Charles P. O'Brien,Druley P,Helen Navaline,D DePhilippis,P Stolley,Abrutyn E +8 more
TL;DR: The sixfold difference in rate of seroconversion between the two groups suggests that although rapid transmission of HIV still occurs, opiate-abusing IVDUs who enter methadone treatment are significantly less likely to become infected.