Table 5. Univariate analysis of selected environmental factors and subject’s infection history with prevalence of amoebiasis.

Variables	No. examined	No. Positive (%)	OR (95% CI)	P value
Toilet facility				0.001
Yes (Hygienic)	597	61 (10.2)	1*
No (Unhygienic)	663	112 (16.8)	1.79 (1.28, 2.49)
Source of water				0.003
Tap water	616	64 (10.4)	1*
Well/ Pond/ River	388	66 (17.0)	1.78 (1.22, 2.56)
Both	256	43 (16.8)	1.74 (1.15, 2.64)
Animal contact				0.149
Yes	491	76 (15.5)	1.27 (0.92, 1.75)
No	769	97 (12.6)	1*
Living condition				<0.001
Poor	408	86 (21.1)	3.21 (1.83, 5.63)
Medium	644	71 (11.0)	1.49 (0.84, 2.62)
Good	208	16 (7.7)	1*
Eating raw vegetables				0.071
No	889	112 (12.6)	1*
Yes	371	61 (16.4)	1.37 (0.97, 1.92)
History of infection in family member				<0.001
Yes	807	144 (17.8)	3.18 (2.09, 4.82)
No	453	29 (6.4)	1*
Anti-amoebic treatment taken previously				<0.001
Yes	481	90 (18.7)	1.93 (1.40, 2.67)
No	779	83 (10.7)	1*
Previous history of infection (subject)				0.038
Yes	614	97 (15.8)	1.40 (1.02, 1.94)
No	646	76 (11.8)	1*
Hand washing				0.002
Yes	883	104 (11.8)	1*
No	377	69 (18.3)	1.68 (1.20, 2.33)
Stool contains mucus and/or blood				<0.001
Yes	221	62 (28.1)	3.26 (2.29, 4.64)
No	1039	111 (10.7)	1*
Symptom				0.005
Symptomatic	498	85 (17.1)	1.57 (1.14, 2.18)
Asymptomatic	762	88 (11.5)	1*