Age When Quit using Smokeless Tobacco after Regular Use Question

**Semantic type:** Intellectual Product

**Definition:** A question about the age of an individual when they started using smokeless tobacco, once they have been using regularly for six weeks.

**Synonyms:** - Age When Quit using Smokeless Tobacco after Regular Use - If the patient used smokeless tobacco (including chewing tobacco and snuff) regularly for at least six weeks, how old were they when they quit using - smokeless tobacco quit age - smokeless_tobacco_quit_age