Week | 0 | 1 | … | 31 |  |
---|---|---|---|---|---|
Contact | 1 | 2 | Â | 3 | Â |
Enrolment | |||||
Screening | X | Â | Â | Â | Â |
Informed consent | X | Â | Â | Â | Â |
Baseline assessment | |||||
Computer-assisted telephone interview | Â | X | Â | Â | Â |
Follow-up assessment | |||||
Computer-assisted telephone interview | Â | Â | Â | X | Â |
Biochemical verification of abstinencea (breath carbon monoxide or salivary cotinine test) | Â | Â | Â | X | Â |
Post study period | |||||
Medical record audit | Â | Â | Â | Â | X |
Quitline data extractionb | Â | Â | Â | Â | X |