Table 1.

Clinical characteristics of the patients

	n = 104
Boy : Girl	73 : 31
Age at onset of NS (years)	4.85 ± 3.87
Age at first flu vaccination (years)	7.76 ± 5.10
Observation period (years)	2.64 ± 2.20
Renal histopathology
MC	62 (59.6%)
FSGS	10 (9.6 %)
DMH	7 (6.7 %)
No history of renal biopsy	25 (24.0%)
Past history of NS type
SRNS	26 (25.2%)
FRNS/SDNS	87 (83.7%)
From day  – 180 ~  + 180
Total number of NS relapses (times)	261
Total number of flu vaccinations (times)	208
Immunosuppressants at flu vaccination
No	43 (20.7%)
Yes	165 (79.3%)
CsA	104 (50.0%)
MMF	40 (19.2%)
MZR	31 (14.9%)
CPM	5 (2.4%)
Tac	2 (1.0%)
RTX	6 (2.9%)
PSL	49 (23.6%)

SRNS Steroid resistance nephrotic syndrome, FRNS Frequent relapsing nephrotic syndrome, SDNS Steroid dependence nephrotic syndrome, MC Minimal change, FSGS Focal segmental glomerulosclerosis, DMH Diffuse mesangial hypercellularity, CsA Cyclosporine, MMF Mycophenolate Mofetil, MZR Mizoribine, CPM Cyclophosphamide, Tac Tacrolimus, RTX Rituximab, PSL; prednisolone