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The visible vent may be far from the actual problem, and improper cleaning can push debris farther into the ductwork
These adjusted predicted probabilities mirror the regression findings, with the lowest model-estimated prevalence observed among exclusive e-cigarette users and little difference between cigarette-only smokers, dual users, and never users
A dose-response trend was also present with increasing ORs observed for higher levels of smoking (1-9 cigarettes daily: OR = 1.05, 95% CI: 0.95, 1.17
This aspect was also observed in the study by Leffondr et al.11 in which it was indicated that, in current smokers, the use of pack-years underestimates the impact of intensity and overestimates that of duration
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