Variations in Patients’ Overall Assessment of Their Health Across and Within Disease Groups Using the EQ-5D Questionnaire: Protocol for a Longitudinal Study in the Swedish National Quality Registers

¹ Health Outcomes and Economic Evaluation Research Group, Stockholm Centre for Healthcare Ethics, Department of Learning, Informatics, Management and Ethics, Karolinska Institutet, Stockholm , SE

² Department of Orthopaedics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg , SE

³ Swedish Hip Arthroplasty Register , Gothenburg , SE

⁴ Centre for Health Policy, University of Melbourne , Melbourne , AU

⁵ Office of Health Economics , London , GB

⁶ City, University of London , London , GB

⁷ Equity and Health Policy Research Group, Department of Global Public Health, Karolinska Institutet, Stockholm , SE

⁸ Health Care Services, Region Stockholm , Stockholm , SE

⁹ See Acknowledgments