“…However, findings from the studies that have examined long-term renal function after preterm birth are less conclusive. The parameters that have been examined in published literature are microalbuminuria as an early sign of hyperfiltration, albuminuria, levels of blood urea nitrogen, serum creatinine, serum cystatin C, estimated GFR (eGFR), impairments in electrolyte excretions and newer biomarkers of renal dysfunction, such as serum or urine neutrophil gelatinase-associated lipocalin (NGAL), symmetric dimethylarginine (SDMA) and serum b2 microglobulin ( Table 1 ) [ 21 , 23 , 24 , 25 , 27 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 40 , 41 , 42 , 43 , 44 , 45 ]. There are a few studies on school-aged children and adolescents that did not observe any difference in eGFR between ex-preterm and term children [ 24 , 25 , 42 ].…”