Appendix I.

Selected predictors of making quit attempts between Waves 1 and 2: Similarities & differences across countries

Predictors	This study (ITC China)	Li et al (ITC-SEA)	Hyland et al (ITC-4)
Lower Nicotine dependence	√	√	√
More immediate quitting intentions	√	√	√
Higher self-efficacy	√	√	×
Longer past quit attempts	√	√	√
Tried in past year	√	×	√
Higher health concerns	×	√	√
Negative opinions/attitudes on smoking	√	×	√
Having smoking restrictions at home	√	×	N.A.
Being younger	×	×	√

Note: “√” means it is an independent predictor; “×” means it is NOT an independent predictor; “N.A”: Not applicable.