Table 3 Association for breast cancer risk with baseline NO2 (quartile).

From: Association between nitrogen dioxide and incident breast cancer in Alberta’s tomorrow project

NO2 Quartile

Model I*

HR (95% CI), p-value

Model II**

HR (95% CI), p-value

Model III***

HR (95% CI), p-value

Q1 (lowest)

1.00

1.00

1.00

Q2

1.12 (0.85–1.45), 0.41

1.14 (0.88–1.48), 0.31

1.16 (0.90–1.50), 0.25

Q3

1.27 (0.97–1.66), 0.08

1.29 (0.99–1.67), 0.06

1.31 (1.01–1.68), 0.04

Q4

0.96 (0.70–1.30), 0.79

0.94 (0.71–1.24), 0.65

0.99 (0.75–1.29), 0.91

  1. Abbreviations: NO2: nitrogen dioxide; HR: hazard ratio; CI: confidence interval; *Adjusted for all covariates; **Adjusted for age, number of births, material deprivation; ***Adjusted for education, social deprivation, and age.
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