Table 3.
Impact of Type of Smoker Vaping Most Assists in Quitting Smoking by 2100
| Vaping does not increase smoking initiation | Vaping increases smoking initiation by 10% | ||||||
|---|---|---|---|---|---|---|---|
| Group of smokers most benefiting from vaping-related cessation rate increase | Annual cessation rate increase due to vaping (%) | Life-years saved (LYS) (millions) | LYS as % of life-years lost due (LYL) to smoking in scenario in which e-cigarettes never existed | E-quitters (millions) | LYS (millions) | LYS as % of LYL due to smoking in scenario in which e-cigarettes never existed | E-quitters (millions) |
| Smokers with greatest difficulty quitting otherwise | 10 | 7.1 | 2.3 | 4.6 | 4.7 | 1.6 | 4.8 |
| 25 | 15.8 | 5.2 | 10.1 | 13.6 | 4.5 | 10.5 | |
| 50 | 26.3 | 8.6 | 16.5 | 24.4 | 8.0 | 17.2 | |
| 100 | 39.1 | 12.8 | 24.3 | 37.6 | 12.3 | 25.4 | |
| All smokers benefit equally | 10 | 4.9 | 1.6 | 3.9 | 2.5 | 0.8 | 4.1 |
| 25 | 11.5 | 3.8 | 9.0 | 9.2 | 3.0 | 9.4 | |
| 50 | 20.5 | 6.7 | 15.9 | 18.5 | 6.1 | 16.6 | |
| 100 | 33.8 | 11.1 | 25.7 | 32.1 | 10.5 | 26.9 | |
| Smokers with least difficulty quitting otherwise | 10 | 4.0 | 1.3 | 3.5 | 1.5 | 0.5 | 3.7 |
| 25 | 9.1 | 3.0 | 8.0 | 6.8 | 2.2 | 8.3 | |
| 50 | 15.9 | 5.2 | 13.8 | 13.7 | 4.5 | 14.4 | |
| 100 | 25.1 | 8.2 | 21.5 | 23.1 | 7.6 | 22.5 |
Assumptions: (1) Risk of vaping compared to smoking = 10%. (2) The background smoking cessation rate does not vary by the age of the smoker.