The impact of cigarette and e-cigarette use history on transition patterns: a longitudinal analysis of the population assessment of tobacco and health (PATH) study, 2013–2015

Table 2 PATH wave 2 definition of product use state

Wave 2 product use state	Definition
Exclusive cigarette smoking	A respondent who was a wave 2 established cigarette smoker^a AND not a wave 2 established e-cigarette user^b
Exclusive e-cigarette use	A respondent who was a wave 2 established e-cigarette user^b AND not a wave 2 established cigarette smoker^a
Dual use	A respondent who was a wave 2 established cigarette smoker^a AND was also a wave 2 established e-cigarette user^b
Neither	A respondent who was neither a wave 2 established cigarette smoker^a NOR a wave 2 established e-cigarette user^b

^aA wave 2 established cigarette smoker is defined as a respondent who was smoking cigarette every day or somedays and had smoked 100 or more cigarettes in entire life by wave 2.
^bA wave 2 established e-cigarette user is defined as a respondent who was using e-cigarette every day or somedays and had used e-cigarette fairly regularly by wave 2

ISSN: 1477-7517