From: Socioeconomic patterning of vaping by smoking status among UK adults and youth
 | RQ1: Is vaping associated with SEP among youth and does this vary by smoking status? | RQ2: Is vaping associated with SEP among adults and does this vary by smoking status? | RQ3: Are socioeconomic inequalities in ex-smoking smaller for ever-smoking adults who vape than those who do not? |
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Sample | Youth aged 10–15 | Adults aged 16+ | Adults aged 16+ |
Exposure | SEP | SEP | SEP |
Outcome | Vaping (overall and by smoking status) | Vaping (overall and by smoking status) | Ex-Smoking (among ever-smokers who do and do not vape) |
Primary Confounders | Country Ethnicity Family Structure Interview Date | Gender Age Country Ethnicity Lives with Spouse/Partner Children in Household Interview Date | Gender Age Country Ethnicity Lives with Spouse/Partner Children in Household Interview Date |
Intermediate Confounders | Gendera Agea Parental Smoking Parental Vaping | Current smoker at 1, 2 & 5 years previous | Current smoker at 1, 2 & 5 years previous |