Kenneth Glad
Fresh research is adding new perspective to a familiar public health question. The latest analysis may help clarify how available options compare.
Nicotine e-cigarettes help more smokers quit than traditional nicotine-replacement products such as patches and gum, according to an updated Cochrane review examining the effectiveness of different smoking-cessation approaches.
Researchers assessed 80 randomized trials involving 29,861 participants, giving the analysis a substantial evidence base. Compared with nicotine-replacement therapy, e-cigarettes containing nicotine were associated with roughly four additional long-term quitters for every 100 people treated, suggesting a meaningful advantage for smokers attempting to stop.
Cochrane rated that comparison as high-certainty evidence, indicating strong confidence in the overall finding. Nicotine e-cigarettes also produced better results than devices without nicotine.
Some evidence is less certain
Quit rates were higher when nicotine e-cigarettes were compared with behavioral support or no support, but Cochrane said confidence in that evidence was lower because of limitations and potential bias in the underlying studies.
Serious adverse events were not shown to occur more frequently among e-cigarette users in the included research. However, investigators said longer studies are still needed to establish the effects of prolonged vaping.
Britain’s National Health Service says vaping exposes users to fewer toxins, and generally at lower levels, than smoking cigarettes. It nevertheless stresses that vaping is not risk-free and should not be taken up by children or people who do not smoke.
Direct comparisons remain limited
BBC highlighted questions about how nicotine e-cigarettes compare with cytisine, a smoking-cessation medicine now available in the UK.
However, researchers still do not have enough direct evidence to say whether nicotine e-cigarettes work better than cytisine. Both can help people quit smoking, but studies have not yet shown that one is clearly more effective than the other.
The NHS says smokers who switch to vaping should stop smoking cigarettes entirely to get the greatest health benefit. It also advises people to eventually give up vaping once they no longer need it to stay smoke-free.
Smoking remains a major preventable cause of disease and premature death, with quitting reducing the risks of lung cancer, cardiovascular disease and stroke.
Sources: Cochrane Review, NHS Better Health, BBC
