Table 1.
Fecal examination was performed by the Kato-Katz method.
a2000-2002: School children (n=29,846); b2002-2004: Inhabitants of 16 Provinces over 15 years of age (n=7,244); c2005: Nationwide survey on school children aged 6-11 years (n=11,770); d2007-2011: Inhabitants of 7 Provinces over 15 years of age (n=6,178).