Table 1. S. japonicum prevalence and intensity of infection in human in the 16 villages at baseline in 2005.

	Sub-group	No. of people examined	Prevalence ( 95% CI )
All		12872	1.65%(1.43,1.87)
Sex
	Male	6655	2.04 % (1.70,2.38)
	Female	6218	1.22 % (0.95,1.50)
Age
	6–9	667	0.30 % (–0.12,0.71)
	10–19	2481	0.85 % (0.49,1.21)
	20–29	920	1.09 % (0.42.1.76)
	30–39	2476	2.18 % (1.61,2.76)
	40–49	2912	2.16 % (1.64,2.69)
	50–59	1979	2.22 % (1.57,2.87)
	60-	1437	1.25 % (0.68,1.83)
Occupation
	Farmer	9662	1.88 % (1.61,2.15)
	Fisherman	73	8.22 % (1.92,14.52)
	Student	2882	0.69 % (0.39,1.00)
	Other	255	1.57 % (0.04,3.09)