Assessment of Dietary Balance in Home-Dwelling Patients With Stage 4 and 5 Chronic Kidney Disease Using URIKI (IKI), a Connected Urine Test Strip and In Vitro Diagnostic Medical Device

Inclusion Criteria: * Adults aged 18 years or older. * Chronic kidney disease (CKD) stage 4 or 5 with estimated glomerular filtration rate (eGFR) \<30 mL/min/1.73 m². * Followed in a nephrology department within a structured care pathway that includes nutritional assessment. * Clinical indication or need for nutritional assessment as part of routine care. * Willing and able to use the URIKI device for nutritional assessment. * Able to understand French or English, or assisted by a caregiver capable of supporting device use and understanding study procedures. * Agreement to the use of the device and to the collection and transmission of study-related data. * Affiliation with a social security system or beneficiary of such coverage. * Access to a compatible smartphone, a smartphone provided by IKI, or assistance from a caregiver for use of the mobile application Exclusion Criteria: * Pregnant or breastfeeding women. * Severe cognitive impairment preventing understanding of study procedures or use of the application without caregiver assistance. * Major motor or sensory impairments (e.g., blindness, hemiplegia) preventing use of the device without caregiver assistance. * Inability to understand French or English without support from a caregiver or third party. * Refusal of the loaned smartphone or persistent inability to use the provided equipment despite support. * Refusal to participate in the study or withdrawal after receiving study information. * Concurrent participation in another interventional clinical study deemed incompatible with this study, or an ongoing exclusion period related to another study. * Individuals under legal protection (guardianship or curatorship), unless participation is authorized by the legal representative and ethics committee