Measurement | Baseline visit | Follow-up visit 1 (day 50) | Follow-up visit 2 (day 197) | Follow-up visit 3 (day 379) |
---|---|---|---|---|
Demographic characteristics | • |  |  |  |
Smoking: | Â | Â | Â | Â |
   Tobacco use and quit attempts [41] | • | • | • | • |
   Fagerström Test for Nicotine Dependence (FTND) [42] | • |  |  |  |
Health perception: (self-constructed questions) | Â | Â | Â | Â |
   health concerns | • | • | • | • |
   risk perception | • | • | • | • |
   self-exempting beliefs | • | • | • | • |
Respiratory health complaints: | Â | Â | Â | Â |
   COPD diagnostic questionnaire [43, 44] | • |  |  |  |
   Medical Research Council (MRC) dyspnoea scale [45, 46] | • |  | • | • |
   Clinical COPD Questionnaire (CCQ) [47, 48] | • | • | • | • |
Health-related quality of life: | Â | Â | Â | Â |
   EuroQol (EQ-5D) [39, 40] | • | • | • | • |
   Short-form 36-item questionnaire (SF-36) [49, 50] | • | • | • | • |
   Chronic Respiratory Questionnaire self-reported (CRQ-SR) [51, 52] | • | • | • | • |
Mental health: | Â | Â | Â | Â |
   Beck Depression Inventory (BDI) [53] | • | • | • | • |
   Hospital Anxiety and Depression Scale (HADS) [54–56] | • | • | • | • |
Cost diary: measurement of direct en indirect medical and non-medical costs [38] |  | • | • | • |
Physical measurements: | Â | Â | Â | Â |
   Physical height and weight | • | • | • | • |
   Post-bronchodilator spirometry | • |  |  | • |
   Urine cotinine (only in self-reported quitters) |  | • | • | • |