Table 3.

Results of blocking treatment of SEED I and SEED II cases by ZSP and PLACEBO after three years of medication

Group		No. subjects	No. EC Diagnosed	Incidence Rates (%)	Block Rates (%)
SEED I	Treatment	1206	20	1.66
	Control	1973	49	2.48
	Total	3179	69	2.17	33.06
SEED II	Treatment	279	8	2.87
	Control	587	53	9.03
	Total	866	61	7.04	68.22