“…206,207 Proteinuria in children is defined by a spot urine protein/creatinine (Up/c) of greater than 0.2 mg/mg creatinine or by a 24-hour urine collection containing protein greater than 4 mg/m 2 /hour. [240][241][242][243][244][245][246][247][248][249] However, there have been no large-scale randomized, controlled trials in pediatric LN; treatment primarily has been determined from the adult studies collection is necessary to eliminate false readings due to the possible contribution of orthostatic proteinuria. Given the cumbersome nature of 24-hour urine collection, and the possible unreliability in young or incontinent children, Up/c determination is a convenient and reliable method for evaluating and following LN in children and shows good correlation with 24-hour urine collection.…”