Conclusion
Our findings suggest that higher ambient air pollution exposure is
associated with greater risk of NAE and AE in adult men and an increased
risk of aeroallergen sensitisation in both sexes. Ongoing efforts to
reduce ambient air pollution exposure are likely to have a range of
health benefits. Nevertheless, further research is needed to identify
the components of ambient air pollution that exert the major effects,
the extent of exposure required to increase risk of eczema and the
factors that determine individual susceptibility. Further efforts are
required to harmonize measurement of ambient air pollution markers, case
definitions, study designs, and assessment of confounding factors to aid
in replication of findings in this area.