Figure 2.

Marginal transition probabilities between tobacco user groups between consecutive waves by asthma diagnosis.

Notes: Transition probabilities presented here were averaged over model covariates, which included sex, age group, and race and ethnicity. Sample sizes exclude those with missing information on asthma diagnoses. Sample sizes for transitions are as follows: Wave 1 to Wave 2 N=23,127; Wave 2 to Wave 3 N=23,526; Wave 3 to Wave 4 N=23,800. At Wave 1, “asthma diagnosis” refers to an ever diagnosis. For waves 2–4, this refers to a past-12-month diagnosis for returning participants or an ever diagnosis for new adult participants.