Table 4. Relationship between active trachoma and daily volume of water used per capita for hygiene, sub-sample.

	No	Number with active trachoma	Prevalence	Adjusted OR1 (95% CI)	Adjusted OR2 (95% CI)	Adjusted OR3 (95% CI)
Litres water used per capita
Total
3.8 - 11.32	58	12	20.7%	1.00	1.00
11.32 - 14.6	59	11	18.6%	0.82 (0.24-2.82)	0.93 (0.27-3.24)
14.6 - 21.3	58	10	17.2%	0.81 (0.23-2.79)	0.81 (0.23-2.88)
21.3 - 15.5	58	11	19.0%	1.00 (0.31-3.32)	1.04 (0.26-3.39)
Children (<9years): bathing and facewashing
<2/week(?)	60	18	30.0%	1.00	1.00	1.00
2-3.5/week	60	8	13.3%	0.35 (0.11-1.19)	0.42 (0.12-1.42)	0.39 (0.11-1.34)
3.5-5/wee/k	56	10	17.9%	0.48 (0.16-1.48)	0.37 (0.11-1.26)	0.29 (0.08-1.11)
>5/week	57	8	14.0%	0.37 (0.11-1.23)	0.38 (0.12-1.22)	0.33 (0.09-1.17)
All ages: bathing and facewashing
< 2.2/week?	59	20	33.9%	1.00	1.00**	1.00**
2.2 - 3.7/week	58	13	22.4%	0.47 (0.15-1.50)	0.46 (0.14-1.50)	0.32 (0.10-1.06)
3.8 - 5.0/week	59	5	8.5%	0.15 (0.05-0.50)	0.16 (0.05-0.52)	0.08 (0.02-0.31)
>5/week	57	6	10.5%	0.21 (0.06-0.68)	0.17 (0.05-0.63)	0.05 (0.01-0.25)
Proportion of total household water used for hygiene
≤17%	61	17	27.9%	1.00	1.00*	1.00*
18-23%	59	11	18.6%	0.62 (0.20-1.91)	0.65 (0.19-2.21)	0.53 (0.15-1.92)
23-32%	57	12	21.1%	0.70 (0.25-1.99)	0.66 (0.26-1.89)	0.59 (0.20-1.75)
>32%	56	4	7.1%	0.23 (0.06-0.93)	0.20 (0.04-1.00)	0.14 (0.02-0.94)

¹Odds ratio adjusted for age, sex and household clustering

²Odds ratio adjusted for age, sex, socio-economic status, household clustering and keeping cattle in same room as people overnight

³Odds ratio adjusted for age, sex, socio-economic status, household clustering, keeping cattle in same room as people overnight and total water use per captia

^*p for trend ≤0.05

^**p for trend ≤0.01