Table 1. Demographic characteristics of study participants in Idukki District (India).

Category	Number	Proportion (95% CI)
Gender
Male	6868	50.3 (49.4–51.1)
Female	6796	49.7 (48.9–50.6)
Religion
Hindu	7693	56.3 (55.5–57.1)
Christian	5111	37.4 (36.6–38.2)
Muslim	821	6.0 (5.6–6.4)
Others	39	0.3 (0.2–0.4)
No. of household members
≤ 5	10,968	80.3 (79.6–80.9)
> 5	2696	19.7 (19.1–20.4)
Education level
Illiterate	184	1.3 (1.2–1.6)
Literate	287	2.1 (1.9–2.4)
School	9800	71.8 (71–72.5)
College	3393	24.8 (24.1–25.6)
Occupation
Jobless	1017	7.4 (7–7.9)
Student	1794	13.1 (12.6–13.7)
Daily labourer	2211	16.2 (15.6–16.8)
Agriculture	1930	14.1 (13.5–14.7)
Housewife	3825	28 (27.2–28.8)
Private job	2103	15.4 (14.8–16)
Govt. job	212	1.6 (1.4–1.8)
Business	438	3.2 (2.9–3.5)
Retired	134	1.0 (0.8–1.2)
Socioeconomic status (according to colour of ration card)
Above poverty line	6332	46.3 (45.5–47.2)
Below poverty line	7084	51.8 (51–52.7)
Extremely poor	248	1.8 (1.6–2.1)
Marital status
Unmarried	3242	23.7 (23–24.4)
Married	9271	67.8 (67.1–68.6)
Widowed	1074	7.9 (7.4–8.3)
Separated	77	0.6 (0.4–0.7)
Type of house
Kutcha—mud floor, uncemented walls and thatched roof	1393	10.2 (9.7–10.7)
Pucca—cemented floor, cemented walls and cemented or tiled roof	9814	71.8 (71.1–72.6)
Mixed—combination of the above types	2457	18.0 (17.3–18.6)
Floor of house
Improved—tile, cement and/or granite/marble	13,213	54.7 (96.4–97)
Unimproved—soil and/or cow dung	133	57.9 (0.8–1.2)
Mix of improved and unimproved	314	3.1 (2.1–2.6)
Not categorised	4	0.2 (0.0–0.1)
Water source
Piped only	3027	22.2 (21.5–22.9)
Piped + well/borewell	1141	8.4 (7.9–8.8)
Piped + well/borewell and surface	8	0.1 (0.0–0.1)
Piped + surface	222	1.6 (1.4–1.9)
Well/borewell only	8028	58.8 (57.9–59.6)
Well/borewell + surface	342	2.5 (2.2–2.8)
Surface only	896	6.6 (6.1–7.0)