Change in glomerular filtration rate over time in the Oxford Renal Cohort Study: observational study

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford; National Institute for Health Research (NIHR) Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford.

Centre for Kidney Research and Innovation, Academic Unit for Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham; honorary consultant nephrologist, University Hospitals of Derby and Burton NHS Foundation Trust.

School of Primary Care, Population Sciences and Medical Education, Faculty of Medicine, University of Southampton, Southampton General Hospital, Southampton.

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford; NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford.

NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford; Nuffield Department of Medicine, University of Oxford, Oxford.

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford.

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford; NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford.

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford; NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford.

Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford.

Nuffield professor, head of primary care health sciences, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford; provice chancellor, director, NIHR Applied Research Collaboration Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford.