Definitions
| Cessation behaviours | Baseline tobacco use group (W1 or W2) | Follow-up outcome (W2 or W3) |
| Discontinuing use (table 2 and online supplemental table 2) | Adults & Youth, Past 30-day users: For each of the five types of tobacco products,* used (product/any tobacco) at least once in the past 30 days | Adults & Youth, Discontinuing use: No past 30-day use of the given tobacco product |
| Making a quit attempt (table 3 and online supplemental table 3) |
Adults,
Current established users†: For cigarettes, currently smoking every day or some days and smoked at least 100 cigarettes in the lifetime; for other tobacco products, currently using the product every day or some days and ever used the product ‘fairly regularly’; for each type of tobacco product, current established use was further categorised according to frequency as everyday use versus not everyday use Youth, Past 30-day non-light cigarette smokers‡: For cigarettes, smoked on at least 10 of the past 30 days, which was further categorised according to frequency as smoked on 20 or more days in the past 30 days versus smoked on 10–19 days in the past 30 days (other tobacco products were not assessed) |
Adults,
Making a quit attempt: Making an attempt to completely quit use of the given tobacco product/tobacco generally,§ or not using the given tobacco product (ie, currently using ‘not at all’ at follow-up or did not use in the past 12 months)¶ Youth, Making a quit attempt: Making an attempt to completely quit cigarettes or not being a past 30-day cigarette smoker |
| Quitting among quit attempters (table 4 and online supplemental table 4) |
Adults, Current established users who made a quit attempt as defined above Youth, Past 30-day non-light smokers who made a quit attempt as defined above |
Adults, Quitting: No everyday/someday use of the given tobacco product Youth, Quitting: No past 30-day use of cigarettes |
*Tobacco product categories include cigarettes, ENDS (e-cigarettes at W1 and e-cigarettes, e-cigars, e-pipes and e-hookah at W2 and W3), cigars (traditional cigars, cigarillos and filtered cigars), hookah and smokeless tobacco (loose snus, moist snuff, dip, spit, chewing tobacco and snus pouches).
†The current established use definition (adults) was used in analyses because these users were asked about making a quit attempt.
‡The past 30-day non-light use definition (youth) for cigarettes was used in analyses because these cigarette smokers were asked about making a quit attempt. Users of other products were not asked about quit attempts.
§Respondents who were current established users of the given tobacco product at follow-up and were current established users of any non-ENDS product at follow-up or were current established users of the given tobacco product at follow-up and were current established users of ENDS and at least one other tobacco product at follow-up, were asked about making an attempt to quit using tobacco generally at follow-up rather than specifically about making an attempt to quit use of the given tobacco product at follow-up.
¶Asked consistently across tobacco products.
ENDS, electronic nicotine delivery systems; W1, Wave 1; W2, Wave 2; W3, Wave 3.