Quitting and switching cigarette use during follow-up
| Cigarette use at baseline | |||
|---|---|---|---|
| E-cigarettes only | Tobacco cigarettes only | Dual use | |
| (n=229) | (n=480) | (n=223) | |
| Switching to another product use group at 24 months | (n=229) | (n=480) | (n=223) |
| No switch | 42.4 | 75.6 | 16.6 |
| Switch to no product use | 18.8 | 17.5 | 14.3 |
| Switch from e-cigarettes only to dual use or tobacco-only smoking | 38.9 | – | – |
| Switch from dual use or tobacco-only smoking to e-cigarettes only | – | 5.6 | 11.7 |
| Switch from dual use to tobacco-only smoking | – | – | 57.4 |
| Switch from tobacco only to dual use | – | 1.3 | – |
| Quitting all product use | |||
| Quit all product use* at 12 months (n=125) | (n=34) | (n=65) | (n=26) |
| Remained abstinent from both tobacco cigarettes and e-cigarettes at 24 months | 76.5 | 72.3 | 69.2 |
| Relapsed to either tobacco and/or e-cigarettes at 24 months | 23.5 | 27.7 | 30.8 |
| Tobacco smoking quitters at 12 months (n=106) | (n=0) | (n=69) | (n=37) |
| Remained abstinent from smoking at 24 months | – | 69.7 | 74.0 |
| Relapsed to tobacco smoking at 24 months | – | 30.3 | 26.0 |
*Both tobacco smoking abstinence/cessation and e-cigarette use abstinence/cessation.