Although the Swedish health care sector has advanced IT systems, and 100% of primary care providers have electronic patient records, several different IT systems are in use and there is a lack of uniform information standards and classifications. County councils, regions and municipalities use different information systems and have adopted different IT solutions that are not always compatible across or even within county councils and levels of care. While there is ample evidence of the use of quality registers for quality improvement in hospital and specialist care, there is less evidence of their application in primary care.