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. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Environ Res. 2016 Mar 31;148:102–111. doi: 10.1016/j.envres.2016.03.036

Table 4.

OR and 95% CI for the association between NO2 and childhood acute myeloid leukemia among urban children.

Quartiles of NO2 Cases Controls Unadjusted
OR (95% CI)		 Adjusted for
Maternal Education
OR (95% CI)
1.00–7.04 ppb <5a 26 Referent Referent
7.05–8.82 ppb 19 58 4.54 (0.96, 21.46) 4.73 (0.97, 23.04)
8.83–11.18 ppb 23 66 4.54 (0.97, 21.35) 4.82 (1.00, 23.31)
11.19–19.89 ppb 20 68 4.09 (0.88, 19.03) 5.25 (1.09, 25.26)
a

Categories with <5 observations suppressed due to confidentiality reasons.

OR=odds ratio, CI=confidence interval