At school urine test                  At IgAN onset No. Sex Age Up(g/g Cr) RBC (/hpf) U-IL6/Cr U-pod (/ml) duration of IgAN onset (month) style of IgAN onset U-IL6/Cr U-pod (/ml) 1 M 7 0.15 30-49 3.7 0.5 12 Macro Ht 7.14 9.6 2 M 10 0.13 100↑ 3.13 0.7 3 appear Up 3.84 2.5 3 M 10 0.06 20-29 5.87 0.6 5 appear Up 7.43 1.9 4 F 12 0.17 50-99 4.18 0.8 11 appear Up 5.39 4.6 5       F 14 0.10 30-49 4.38 0.5 8 Macro Ht 8.22 5.5             Mean 0.13 ― 4.3  * 0.62 7.7 ― 6.26 4.81     ±1.18       ±1.67 ±3.5 other 41 Ht   10.2 0.08 ― 1.61 0.37 18.3 ― ― ― children 3-     ±1.17             range 18 0.02-0.17 ― 0.4-5.87 0-0.8 3-81 ― ― ― IgAN, IgA nephropathy; Up, urinary protein; RBC, red blood cells; U-IL6, urinary excretion of interleukin-6; U-pod, urinary podocytes; Ht, hematuria. *p<0.05

Table 3: Clinical and laboratory findings of four children who transited from asymptomatic hematuria to IgA nephropathy during the observation period.