Contributors

Prof. Dr. Dr. U. Abel, Abteilung Medizinische Biometrie der Universität Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany

• The mythology of randomization
• The Analysis of Intervention Effects Using Observational Data Bases
    

Dr. S.G. Baker, Biometry Branch, Division of Cancer Prevention and Control, National Cancer Institute, EPN 344, 9000 Rockville Pike, Bethesda, MD 20892, U.S.A.

• The Paired Availability Design: An Update
   

Professor N. Black, Health Services Research Unit, Department of Public Health, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, United Kingdom

PD Dr. D. Boehning, Free University Berlin, Department of Epidemiology, Fabeckstr. 60, 14195 Berlin, Germany

• Modelling unobserved non-compliance in clinical studies
    

Dipl.-Volksw. K. Dannehl, Diabetes-Forschungsinstitut an der Heinrich-Heine-Universität Düsseldorf, Abteilung Biometrie und Epidemiologie, Auf´m Hennekamp 65, 40225 Düsseldorf, Germany

• Experimental Study versus Non-Experimental Study:
  The Non-Experimental (Non-Randomized) Study as a Methodological Compromise
    

Dr. E. Dietz, Free University Berlin, Department of Epidemiology, Fabeckstr. 60, 14195 Berlin, Germany

• Modelling unobserved non-compliance in clinical studies
    

Dr. L. Edler, Biostatistics Unit - 2070, German Cancer Research Center, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany

• Evidence based conclusions on the efficacy of a treatment - What can be learned from risk assessment?
    

Professor A.R. Feinstein, Yale University School of Medicine, Clinical Epidemiology Unit, 333 Cedar Street, New Haven, CT 06520-8025, U.S.A.

• PROBLEMS OF RANDOMIZED TRIALS
    

PD Dr. O. Gefeller, Department of Medical Statistics, University of Göttingen, Humboldtallee 32, 37073 Göttingen, Germany

• A Nonparametric Test for Evaluating Coherent Alternativesin Nonrandomised Studies
    

Dipl.-Stat E. Graf, Institut für Medizinische Biometrie und Medizinische Informatik der Universität Freiburg, Stefan-Meier-Str. 26, 79104 Freiburg, Germany

• Modelling Response: Traditional approaches compared to the propensity score
    

Dr. U. Haag, Abteilung Medizinische Biometrie der Universität Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany

• The Early vs. Late Infantile Strabismus Surgery Study - Experiences from a Non-Randomised Clinical Trial
    

Prof. Dr. C. Herfarth, Department of Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany

• A non-randomized comparative study of adjuvant chemotherapy after liver resection for metastatic colorectal cancer.
    

Dr. C. Heuer, Abteilung Medizinische Biometrie der Universität Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany

• The Analysis of Intervention Effects Using Observational Data Bases
    

Dipl.-Inf. med. U. Hinz, Section of Surgical Oncology, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany

• A non-randomized comparative study of adjuvant chemotherapy after liver resection for metastatic colorectal cancer.
    

Dipl.-Math. H. Hirche, Institute of Medical Informatics, Biometry and Epidemiology, University of Essen, Hufelandstr. 55, 45122 Essen, Germany

• Results of an observational pilot study on the effects of non-conventional therapies — A pre/post comparison and cost-outcome analysis
    

Dipl.-Phys. A. Hörmann, GSF - Institut für Medizinische Informatik und Systemforschung, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany

• "The 60-Minutes-Myocardial Infarction Project": Comparison with a Registry and a Randomized Clinical Trial
    

Prof. Dr. K.-H. Jöckel, Institute of Medical Informatics, Biometry and Epidemiology, University of Essen, Hufelandstr. 55, 45122 Essen, Germany

• Results of an observational pilot study on the effects of non-conventional therapies — A pre/post comparison and cost-outcome analysis
    

Dr. A. Koch, Abteilung Medizinische Biometrie der Universität Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany

• "The 60-Minutes-Myocardial Infarction Project": Comparison with a Registry and a Randomized Clinical Trial
• The mythology of randomization
    

Dr. R. Lefering, Biochemical and Experimental Division, Second Department of Surgery, University of Cologne, Ostmerheimer Str. 200, D - 51109 Cologne, Germany

• Problems of Randomized Controlled Trials (RCT) in Surgery
    

Prof. Dr. T. Lehnert, Section of Surgical Oncology, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany

• A non-randomized comparative study of adjuvant chemotherapy after liver resection for metastatic colorectal cancer.
    

Dr. med. H. Löwel, GSF Institut für Epidemiologie, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany

• "The 60-Minutes-Myocardial Infarction Project": Comparison with a Registry and a Randomized Clinical Trial
    

Prof. Dr. J. Michaelis, Institut für Medizinische Statistik und Dokumentation, Klinikum der Johannes-Gutenberg-Universität Mainz, Obere Zahlbacher Str. 69, 55101 Mainz, Germany

• Reference - controlled observational studies - a new tool for post marketing studies and for evaluation of preventive measures
    

Dr. S. Moebus, MPH, Institute of Medical Informatics, Biometry and Epidemiology, University of Essen, Hufelandstr. 55, 45122 Essen, Germany

• Results of an observational pilot study on the effects of non-conventional therapies — A pre/post comparison and cost-outcome analysis
    

Prof. Dr. E. Neugebauer, Biochemical and Experimental Division, Second Department of Surgery, University of Cologne, Ostmerheimer Str. 200, D - 51109 Cologne, Germany

• Problems of Randomized Controlled Trials (RCT) in Surgery
    

C. Ose, Institute of Medical Informatics, Biometry and Epidemiology, University of Essen, Hufelandstr. 55, 45122 Essen, Germany

• Results of an observational pilot study on the effects of non-conventional therapies — A pre/post comparison and cost-outcome analysis
    

Professor D.B. Rubin, Department of Statistics, Harvard University, 1 Oxford Street, Cambridge, MA 02138, U.S.A.

• Estimation from nonrandomized treatment comparisons using subclassification on propensity scores
    

Prof. Dr. J. Senges, Medizinische Klinik B, Klinikum Ludwigshafen, Bremserstr. 79, 67063 Ludwigshafen / Rhein, Germany

• "The 60-Minutes-Myocardial Infarction Project": Comparison with a Registry and a Randomized Clinical Trial
    

S. Vagiaris, Section of Surgical Oncology, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany

• A non-randomized comparative study of adjuvant chemotherapy after liver resection for metastatic colorectal cancer.
    

Dr. M. Wadepuhl, Versuchsplanung und statistische Auswertung, Köllestr. 39, 89077 Ulm, Germany

• Can postmarketing surveillance studies (Anwendungsbeobachtungen) give meaningful answers to important questions? A critical discussion of 5 examples.
    

Dr. F. Willeke, Department of Surgery, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany

• A non-randomized comparative study of adjuvant chemotherapy after liver resection for metastatic colorectal cancer.
    

PD Dr. J. Windeler, Abteilung Medizinische Biometrie der Universität Heidelberg, Im Neuenheimer Feld 305, 69120 Heidelberg, Germany

• Recommendations concerning "Anwendungsbeobachtungen"