We next created a more elaborate ordinal measure designed to describe baseline smoking history in a way that takes into consideration information contained in all eight of the measures considered above. This results in a six-category classification scheme in which the lowest category consists of respondents who never smoked and the highest of respondents with a history of early-onset use, early-onset daily use, and early-onset dependence. (Table 4) The two highest categories in this scheme are associated with significantly elevated ORs of ideation in the gross model. The highest category is associated with a significantly elevated OR of plans in the gross model. None of the categories, though, is significantly associated with either gestures or attempts in the gross models.
