Results from sensitivity analyses among never-smokers (Table 3 for
the significant effects and Table S3 for the complete set of markers) and
among controls only (see Supplemental material, Table S7) were similar,
though with larger standard errors, compared to the results from
our main analyses, suggesting limited impact of potential residual confounding
of smoking or future (lymphoma or breast cancer) case status.
We assessed the impact on our results of additional correction for further
covariates available in the EnviroGenoMarkers dataset, but observed
no considerable changes in effect estimates (b5% for the
markers of inflammation for which we observed a significant association
with NOx; results not shown).