[Memorandum III, Part 3: Quality of Care and Patient Safety Research Methods].

The German Network for Health Services Research [Deutsches Netzwerk Versorgungsforschung e.V. (DNVF)] fosters the methodological quality of health services research studies by memoranda and other initiatives. Quality of care and patient safety research (QCPSR) form core areas of health services research. The present memorandum explicates principal QCPSR questions and methods. Based on the issues' particular relevance for health policy, the memorandum exemplifies methods for developing and testing indicators, risk adjustment techniques, methods for collecting patient safety data, tools to analyse patient safety incidents and methods for evaluating often complex and multicomponent QCPS interventions. Furthermore, we point out urgent research topics.