Evidence-informed health care policy and practice: using record linkage to uncover new knowledge.

Record linkage of health data has been beneficial to inform the design, delivery and evaluation of health care practices, and to improve the quality of clinical care and patient outcomes. We discuss some of the key strengths and limitations of using record linkage as the basis of an evidentiary approach for improved health services, and for conducting health services research. We illustrate the benefits of linking information from disparate administrative data collections, uncovering new knowledge, and influencing health policy or clinical practice, or both. Continued advancement of data methods and models, infrastructure to support research, and, above all, making administrative data accessible, will help ensure more effective delivery of health care services.