Table 2. Difference in lung cancer incidence attributable to arsenic exposure alone for high and low-exposure areas in the U.S. based on the results of the adjusted Poisson models and USGS survey quantiles in Figure 1.

Compound	Low (ppm)	High (ppm)	β-Estimate	Lung Cancer Rate Increase (%)
Arsenic	1.477	14.525	0.0039	5.3%