The randomized study provides a number of important benefits that can never be realized in a survey study. Most importantly, the RCT can equalize between study groups the known and unknown confounding variables that may lead to invalid study results.

Electronic cigarettes are not for everyone, and this study was not designed to examine the proportion of smokers who will be successful in quitting or cutting down substantially. However, it does document that among those who are successful in becoming ex-smokers or dual users with substantially lowered cigarette consumption, they will likely experience an improvement in their respiratory health.

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