Table 1.

Demographics of study participants enrolled in an interventional trial on household water treatment in Adukamparai Kattupadi village

	Total	Reddiar	Harijan	P value
Number of participants	126	66	60
Average age (years)	44	47	43	0.087
Education
Secondary or higher	23%	36%	9%	0.001
Middle school or less	77%	64%	92%
House Type
Mansion (cement, > 5 rooms)	13%	21%	3%	0.001
Pucca (cement, < 5 rooms)	35%	43%	25%
Hut	28%	22%	35%
Other (intermediate)	24%	14%	37%
Type of cooking fuel
Wood/cow dung only	42%	13%	73%	0.001
Gas/electric, etc.	58%	87%	27%
Source of water
Domestic tap	32%	48%	13%	0.001
Public tap	65%	45%	87%
Closed well	4%	7%	0%