TY - JOUR
T1 - Causal inference in a clinical trial
T2 - A comparative example
AU - Heitjan, Daniel F.
PY - 1999/8
Y1 - 1999/8
N2 - Recently there has been much interest in methods for analyzing clinical trials of treatments that are subject to noncompliance. In this paper I study a small, simple dataset from a clinical trial of immunosuppressive therapy in the treatment of multiple sclerosis. I apply and compare a range of methods: the as-randomized (intention-to-treat) analysis, the as-treated analysis, estimates based on a nonignorable selection model, and Rubin's causal model. The results differ substantially even in this small dataset that exhibits modest noncompliance. For this reason, data analysts should be clear about which parameters are of greatest importance in the analysis of a clinical trial. Control Clin Trials 1999;20:309-318 Copyright (C) 1999 Elsevier Science Inc.
AB - Recently there has been much interest in methods for analyzing clinical trials of treatments that are subject to noncompliance. In this paper I study a small, simple dataset from a clinical trial of immunosuppressive therapy in the treatment of multiple sclerosis. I apply and compare a range of methods: the as-randomized (intention-to-treat) analysis, the as-treated analysis, estimates based on a nonignorable selection model, and Rubin's causal model. The results differ substantially even in this small dataset that exhibits modest noncompliance. For this reason, data analysts should be clear about which parameters are of greatest importance in the analysis of a clinical trial. Control Clin Trials 1999;20:309-318 Copyright (C) 1999 Elsevier Science Inc.
KW - Intention-to-treat analysis
KW - Noncompliance
KW - Nonignorable model
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U2 - 10.1016/S0197-2456(99)00012-4
DO - 10.1016/S0197-2456(99)00012-4
M3 - Article
C2 - 10440558
AN - SCOPUS:0032988557
SN - 0197-2456
VL - 20
SP - 309
EP - 318
JO - Controlled Clinical Trials
JF - Controlled Clinical Trials
IS - 4
ER -