Previous studies have shown that, compared with never-smokers, current smokers have an OR of 3.51 (95% CI: 3.083.99), and former smokers have an OR of 2.89 (95% CI: 2.633.17) for COPD risk, with smoking duration being a key factor (33, 34)
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Figure 6 Number of studies analyzed that confirm the relationship between the use of EC and the consumption of conventional cigarettes and other substances DISCUSSION The present study posed the following research question: What are the risk and protective factors for e-cigarette use among adolescents, its association with tobacco and other substance use, and the evidence of its use as a smoking cessation strategy?
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By dividing BMP by tBMP and multiplying by 100, the equation expresses the fraction of CA that has been biodegraded, providing a measure of the materials degradability under the specific experimental conditions
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