Association of Chronic Kidney Disease Stage with 24-Hour Urine Values Among Patients with Nephrolithiasis.

Nephrolithiasis is a known risk factor for chronic kidney disease (CKD); however, it is unknown how CKD affects urinary parameters related to stone risk. The purpose of this study was to assess the relationship of diminishing glomerular filtration rate (GFR) and kidney stone-related 24-hour urine (24H urine) composition. A single-institution retrospective review of patients ( = 2057) who underwent 24H urine analysis was performed.