Fig. 2

Changes in smoking cessation stage from 2016 to 2017 by sex and age, method of smoking cessation, and HSI. (a) (male) 67 y, self-directed, HSI = 2; (b) (male) 43 y, self-directed, HSI = 3; (c) (male) 63 y, self-directed, HSI = 0; (d) (male) 42 y, self-directed, HSI = 0; (e) (female) 46 y, hospital-directed treatment, HSI = 1; (f) 58 y, self-directed, HSI = 4. HSI, Heavy Smoking Index. Stage 1 (the immotive stage): “I am not interested in smoking cessation.”. Stage 2 (the precontemplation stage): “I am interested in smoking cessation, but have no plan within the next 6 months.”. Stage 3 (the contemplation stage): “I’d like to quit smoking within the next 6 months, but I have no plan to within 1 month.”. Stage 4 (the preparation stage): “I’d like to quit smoking within 1 month”