Improving Patient Assessment After Acute Kidney Injury (AKI)

Inclusion Criteria: Observational study workstream * Age 18-85 years * AKI stage 2 or 3 during hospital admission OR AKI stage 1 of at least 7 days duration during hospital admission * 60-90 days after peak creatinine Qualitative interview workstream * Age 18-85 years * AKI during hospital admission * 60-90 days after peak creatinine Participatory workshop workstream * Age 18-85 years * Relevant experience (as assessed by the investigator) which could include personal experience of an episode of hospitalised AKI as a patient of carer, experience of managing AKI or related problems in a professional capacity or knowledge of a particular community. Exclusion Criteria: Observational study workstream * Inability to give informed consent * No baseline creatinine available in previous 12 months * Pregnancy or breastfeeding * Current treatment with dialysis * Renal transplant * Pacemaker in situ * Previous amputation * Allergy to Omnipaque contrast agent (WP1 only) * Manifest thyrotoxicosis (WP1 only) * Ascites or significant (grade 3 to 4) peripheral oedema, defined as ≥6 mm pit, lasting for \>1 minute after 5-second compression over tibia or medial malleolus (WP1 only) Qualitative interview workstream * Inability to give informed consent * No baseline creatinine available in previous 12 months * Current treatment with dialysis * Renal transplant * Receiving palliative care Participatory workshop workstream * Inability to give informed consent * Inability to communicate in English (the qualitative workshops will be held in English)