The symposium held at Freiburg on September 10th, 1983 had been con cerned with methodical problems in early detection. chiefly of can cer. The first lectures dealt with mathematical models. They were followed by contributions to the possibilities of obtaining the pa rameters required by the models and for the assessment of the me thods. The two final lectures outlined a monitoring system for rare diseases and some problems in early detecting heart and circulation diseases. The meeting had been organized by the Deutsche Gesellschaft fUr Me dizinische Dokumentation. Informatik und Statistik (GMDS). Thus the programme committee was set up by the heads of the GMDS Arbeitsgrup pen affected by the respective topics. namely Dr. Keil (epidemiology}. Prof . Dr. NeiS (statistical methods). PD Dr. Schwartz (systematic preventive checkup and early detection). PD Dr. Trampisch (methods of prognosis and decision making) and the signer. This is a welcome opportunity to put on record my thanks to various people and organizations. The lecturers had elaborated their manus cripts and some have revised them. The individual discussions had been conducted by Prof. Dr. Dietz. Prof. Dr. Michaelis. Prof. Dr.

Some Aspects of Mathematical Screening Models

Mathematical Approaches to the Problem of Early Detection of Chronic Diseases with Particular Reference to Human Neoplasias
Computer Simulation and the Practical Planning of Cervical Cancer Screening Programmes
Mathematical Modelling of Interacting Factors in the Analysis and Optimization of Cancer Screening
Theoretical and Practical Criteria for the Evaluation of Screening Programmes
Evaluation of Cancer Screening
The Utility of Cancer Screening A Decision Help by Critical Values
Testing and Estimating the Sensitivity and the Specificity of Diagnostic Procedures
On the Lead Time of a Periodic Screening Programme
Estimation of Optimal Examinitation Intervals in Screening for Colorectal Cancer
Diagnostic Validity of Screening by Sonography and Low Dose Mammography of the Breast
The Effectiveness of Examinations in the Early Detection of Cervical Cancer
Confirmation of Disease Monitoring Results and Disease Clustering
Screening for Hypertension
Discussion about Open Problems with Early Detection of Cancer.