Well water contaminants and colorectal cancer in North Dakota

Table 1 Multiple linear regression results in full-model

Variable	Degree of freedom	Estimate	Error	T value	P value > |t| value
Intercept	1	40.95586	6.38254	6.42	0.0002
Arsenic	1	-0.2069	0.32602	-0.63	0.5434
Barium	1	-0.06907	0.02115	-3.27	0.0114
Chlorine	1	0.02976	0.02203	1.35	0.2137
Iron	1	4.75042	0.992	4.79	0.0014
Nitrogen	1	0.48432	0.52651	0.92	0.3845
Well water	1	1.01243	0.42954	2.36	0.0462
Population density	1	0.01519	0.11723	0.13	0.9001