From: Switching to smokeless tobacco as a smoking cessation method: evidence from the 2000 National Health Interview Survey
Years Since Quitting
Nicotine Patch (n = 128)
Nicotine Gum (n = 42)
Bupropion (n = 39)
Switched to ST (n = 33)
0–4
60%
47%
95%
40%
5–9
27
14
0
12
10–14
11
17
18
15–19
1
9
20+
5
21