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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Environ Res. 2016 Apr 29;148:450–456. doi: 10.1016/j.envres.2016.04.030

Table 4.

Standard Poisson Regression Results (Crude and Adjusted)

Model Exposure Variable SIR (95% CI) p-value p for trend
Crude Arsenic tertiles 0.181
0.33 to 0.72 ppb 1.00 (reference)
0.73 to 1.60 ppb 1.17 (1.08–1.26) <0.001
1.61 to 16.23 ppb 1.13 (1.05–1.21) 0.001
Adjusted 1 Arsenic tertiles 0.001
0.33 to 0.72 ppb 1.00 (reference)
0.73 to 1.60 ppb 1.07 (0.98–1.17) 0.146
1.61 to 16.23 ppb 1.12 (1.05–1.20) 0.001
Adjusted 2 Arsenic tertiles 0.004
0.33 to 0.72 ppb 1.00 (reference)
0.73 to 1.60 ppb 1.05 (0.96–1.15) 0.299
1.61 to 16.23 ppb 1.10 (1.02–1.18) 0.011
Adjusted 3 Arsenic tertiles 0.003
0.33 to 0.72 ppb 1.00 (reference)
0.73 to 1.60 ppb 1.05 (0.96–1.16) 0.264
1.61 to 16.23 ppb 1.10 (1.03–1.19) 0.008
Crude Arsenic (per 10 ppb) 1.01 (0.93–1.10) 0.794
Adjusted 1 Arsenic (per 10 ppb) 1.06 (0.96–1.17) 0.233
Adjusted 2 Arsenic (per 10 ppb) 1.10 (1.02–1.19) 0.013
Adjusted 3 Arsenic (per 10 ppb) 1.12 (1.04–1.20) 0.004
1

Adjusted for the percentage of black male residents, and the percentage of other race male residents

2

Adjusted for the percentage of black male residents, the percentage of other race male residents, and the percentage of residents living below the federal poverty line

3

Adjusted for the percentage of black male residents, the percentage of other race male residents, the percentage of residents living below the federal poverty line, and the percentage of residents reporting private well use