The study has two objectives/aims:
Aim 1: To test the efficacy of the intervention among adult smokers with cardiovascular
disease, pulmonary disease and diabetes mellitus related illnesses (later modified to Chinese
adults with and without diseases); and
Aim 2: To examine a set of measures (background, general health, psychosocial, and smoking
process) that are associated with smoking cessation at 6 and 12 months