Potential deaths averted in USA by replacing cigarettes with e-cigarettes.

Area of Science:

• Public Health
• Tobacco Control
• Epidemiology

Background:

• US tobacco control policies have slowed cigarette use but progress is gradual.
• E-cigarettes (vaping) present a potential strategy to accelerate tobacco control.
• The role of e-cigarettes in public health remains a subject of debate within the tobacco control community.

Purpose of the Study:

• To project the public health impact of substituting cigarette smoking with e-cigarette use in the USA.
• To compare mortality outcomes under a status quo scenario versus e-cigarette substitution scenarios.
• To evaluate potential life year gains and reductions in premature deaths.

Main Methods:

• Development of a Status Quo Scenario projecting smoking rates without e-cigarettes.
• Creation of Substitution Models where cigarette use is largely replaced by vaping over 10 years.
• Testing of Optimistic and Pessimistic Scenarios considering relative harm and initiation/cessation/switching impacts.
• Comparison of projected mortality outcomes by age and sex from 2016 to 2100.

Main Results:

• The Optimistic Scenario projected 6.6 million fewer premature deaths and 86.7 million fewer life years lost.
• The Pessimistic Scenario projected 1.6 million fewer premature deaths and 20.8 million fewer life years lost.
• Significant gains in life expectancy were projected, particularly for younger cohorts.

Conclusions:

• Replacing cigarette smoking with vaping can yield substantial public health benefits, including significant life year gains.
• These benefits are projected even under pessimistic assumptions regarding e-cigarette risks and user behavior.
• The findings support the consideration of e-cigarette substitution as a viable tobacco control strategy.