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Download Cancer Clinical Trials: A Critical Appraisal by U. Tröhler (auth.), Dr. Hans Scheurlen, Dr. Richard Kay, PDF

By U. Tröhler (auth.), Dr. Hans Scheurlen, Dr. Richard Kay, Professor Dr. Michael Baum (eds.)

The managed medical trial has develop into a vital a part of the clinician's decision-making strategy. medical trials, even if, nonetheless increase methodological difficulties which are very important and while arguable: subgroup research and interactions, meta-analy­ sis of comparable trials, attention of subjective medical reviews and people of the general public at huge, overview of caliber of lifestyles, pre­ vention trials, etc. In February 1987 we took our 3rd step alongside the line to comparing those matters in dialogues among cli­ nicians, psychologists, criminal specialists, and statisticians. The talks offered on the assembly have been revised through the authors afterwards and feature been rearranged by means of the editors to shape a strictly organ­ 1 2 ized ebook. the 2 previous conferences in 1978 and 1981 targeted strongly on adjuvant remedy in basic breast melanoma, yet this most sensible­ ic served in basic terms as a nucleus within the 3rd assembly. This assembly, even supposing known as the 3rd Heidelberg Symposium used to be compelled to depart Heidelberg and in reality was once held in Freiburg. with no the curiosity and exuberance of Professor Martin Schu­ macher and his colleagues in Freiburg the assembly may by no means have taken position. The assembly was once generously supported back through the Federal Ministry of analysis and expertise (Bundesministe­ rium flir Forschung und Technologie, BMFT) in the framework of the West German BMFT Breast melanoma examine workforce. we're thankful, particularly, to Mr. Hans W. Herzog for his own in­ volvement. Juni 1988 H. Scheurlen, R. Kay, M.

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Extra resources for Cancer Clinical Trials: A Critical Appraisal

Sample text

Cluster randomization was chosen, based upon the hypothesis that heavy smokers will find it easier to stop smoking when cessation assistance is made widely available in an environment where smoking is made less socially acceptable. In this situation intervention must be assigned to social units larger than the individual. This intervention hypothesis led to a decision to study pairs of communities with populations of 50000-170000, with one community of each pair assigned randomly to intervention and the other to serve as a control community.

Biometrics 35: 549-556 Peto R (1978) Clinical trial methodology. Biomedicine (Paris) 28: 24-36 Simon R (1984) The importance of prognostic factors in cancer clinical trials. Cancer Treat Rep 68: 185-192 Simon R (1986) Confidence intervals for reporting clinical trial results. Ann Intern Med 105: 4429-4435 Simon R, Wittes RE (1985) Methodologic guidelines for clinical trial reports. Cancer Treat Rep 69: 1-3 Simon R, Wittes RE, Ellenberg SS (1985) Randomized phase-II clinical trials. Cancer Treat Rep 69: 1375-1381 Spiegelhalter DJ, Freedman LS, Blackburn PR (1986) Monitoring clinical trials: conditional or predictive power?

Drug) influences the timing or dose of the other factor. Proper factorial designs cannot be used in such situations. The second limitation is that the results of a 2 x 2 factorial trial can be unambiguously interpreted only if one assumes that there is no interaction between the factors and response, i. , that the effect of one factor on response does not depend on the level of the other factor. Proponents of factorial designs sometimes claim as a strength the opportunity to discover such interactions.

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