Table 2 Measurement schedule
Variables | Measurement at month | |||||
|---|---|---|---|---|---|---|
0 | 3 | 5 | 6 | 9 | 15 | |
Primary outcome | ||||||
 Cotinine level |  | X |  |  |  | X |
Secondary outcomes | ||||||
 Nicotine dependence (Fagerström) | X |  |  | X | X |  |
 MAP-HSS + smoking related complaints of smokers | X |  |  | X | X | X |
 Depression, anxiety and stress (DASS21) | X |  |  | X | X | X |
 Quality of Life (Euroqol 5D) | X |  |  | X |  |  |
 Smoking status | X | X |  | X | X | X |
 Adherence |  |  |  |  |  | X |
 Costs |  |  |  |  |  | X |
Baseline predictors and moderators of treatment effect | ||||||
 Internet Skills | X |  |  |  |  |  |
 Readiness to change | X |  |  |  |  |  |
 Attitude | X |  |  | X | X |  |
 Social Influence | X |  |  |  |  |  |
 Self-Efficacy | X |  |  | X |  |  |
 Alcohol/substance (mis)use | X |  |  | X |  |  |
Descriptive variables | ||||||
 Patient characteristics and medical history | X |  |  |  |  |  |
 Smoking history | X |  |  |  |  |  |
 Stop Smoking History | X |  |  |  |  |  |
Other information of interest | ||||||
 Evaluation of treatment |  | X |  | X | X | X |
 Exhaled carbon monoxide (CO) level | X | X | X |  |  | X |