diesel, cumulative waterpipe dose, heating house by hot air, and having at least one smoker at work were significant predictors of a lower respiratory quality of life (higher CCQ score; P < 0.05 for all); ever living close to a local power plant (electricity generator) was important but its effect did not reach statistical significance ( P < 0.10) ( Table 6 ).
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Cigarette and waterpipe smoking decrease respiratory quality of life in adults: results from a national cross-sectional study.
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