Table I.

Comparison of total efficiency and the incidence of complications [case (%)].

Group	Case	Excellenta	Effectiveb	Ineffectivec	Total effective rate	Secondary infection	Renal function deterioration	Stress ulcer	Complicationd
Control	30	9	10	11	19 (63.3)	3	5	2	10 (33.3)
Observation	30	13	13	4	26 (86.7)	1	2	0	3 (10.0)
χ2 test					4.356				4.812
P-value					0.037				0.028

^aExcellent, clinical symptoms disappeared and IgA deposition decreased by >90%.

^bEffective, clinical symptoms mostly disappeared and IgA deposition decreased by 50–80%.

^cIneffective, clinical symptoms were not improved.

^dComplications included IgA secondary hypertension, increased proteinuria, secondary infection, renal function deterioration, and stress ulcer.