A cross-sectional survey on knowledge and perceptions of health risks associated with arsenic and mercury contamination from artisanal gold mining in Tanzania

Table 1 Knowledge about Mercury and Arsenic toxicity among individuals in Rwamagasa area

	Group	Category	N	Knowledgeable		p-value	OR	95% CI for OR
				n	%			min	max
Mercury	Economic activity	Agriculture	63	23	14.4	<0.001	0.258	0.137	0.483
		Mining	86	63	39.4
		Business & Public services	11	9	5.6
	Education	Illiterate	56	28	17.5	0.203	0.934	0.511	1.705
		Primary	91	59	36.9
		Secondary and above	13	8	5.0
	Sex	Male	89	59	36.9	0.046	1.875	0.944	3.726
	Sex	Female	71	36	22.5	0.046	1.875	0.944	3.726
Arsenic	Economic activity	Agriculture	63	2	3.2	<0.001	0.284	0.11	0.733
		Mining	86	10	11.6
		Business & Public services	11	5	45.4
	Education	Illiterate	56	1	1.8	0.005	0.334	0.123	0.908
		Primary	91	12	13.2
		Secondary and above	13	4	30.8
	Sex	Male	89	13	14.6	0.067	2.79	0.769	10.14
		Female	71	4	5.6

ISSN: 1471-2458