Association between polycyclic aromatic hydrocarbons exposure and current asthma: a population-based study.

At the anterior end of the inflection point, there was no significant trend in current asthma risk with increasing log 1-Hydroxynaphthalene [0.90 (0.65, 1.25), p = 0.5418], whereas there was a significant trend in current asthma risk with increasing log 1-Hydroxynaphthalene at the posterior end of the inflection point [1.46 (1.27, 1.68), p < 0.0001].

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