Results: A study of 30 children diagnosed with the initial nephrotic syndrome was followed up at Hue Pediatric Center of Hue Central Hospital and Pediatrics Departement of Hue University of Medicine and Pharmacy Hospital. Urinary suPAR / creatinine ratio was 2712 ± 2217 pg / mg (605 - 11443 pg / mg), urinary suPAR / creatinine ratio in children 1 - 6 years old was significantly higher than that in group 7 - 15 years old, there was no signifficant difference about urinary suPAR between hematuria and non-hematuria group.