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Indeed, smoking status alone only explained 0.1% of the variance observed in the inattention component score

Furthermore, the sample size in our study was very small, which might mean that statistical analyses will not show significant results even if effects were present

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It also means that people who do not smoke or would not have otherwise smoked should not use e-cigarettes. A Serious Lack of Long-term Health Studies One of the main concerns regarding the use of e-cigarettes as a smoking cessation tool is the dearth of studies on their long-term effects