Prevalence and Severity of Cramps in Chronic Kidney Disease Patients

Cramps are a frequent and severe complication in CKD patients. Their characteristics : triggering factors, associated factors, are not well known. There is no recognized effective treatment. Using a questionnaire, the investigators wish to determine prevalence, severity and associated factors of cramps in our CKD patients. Better knowledge about cramps in CKD patients will allow to better support, and give a practical tool for treatment evaluation.