Mixed-model analysis of incomplete longitudinal data from a high-dose trial of tacrine (cognex®) in alzheimer's patients
作者:
Fraser Smith,
期刊:
Journal of Biopharmaceutical Statistics
(Taylor Available online 1996)
卷期:
Volume 6,
issue 1
页码: 59-67
ISSN:1054-3406
年代: 1996
DOI:10.1080/10543409608835122
出版商: Marcel Dekker, Inc.
关键词: ADAS-Cog;Disease progression;Incremental-dose increases
数据来源: Taylor
摘要:
Mixed-model techniques are applied to incomplete longitudinal data from a double-blind, placebo-controlled, parallel-group, high-dose study of tacrine in patients with Alzheimer's disease. The study consisted of a 30-week double-blind treatment period. Patients were randomized to one of four treatment groups. Dosing was initiated at 40 mg/day and increased in increments of 40 mg/day every 6 weeks until the target dose was achieved. If the study medication was not well tolerated or there were significant elevations in alanine aminotransferase, patients were withdrawn from the study. The use of SAS procedure PROC MIXED for the analysis of incomplete longitudinal data is discussed. This approach is used to evaluate disease progression over time and the effect of incremental dose increases of tacrine on changes on the Alzheimer's Disease Assessment Scale-Cognitive subscale.
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