Table 1 Key methodological features of the TDI and SGP surveillance studies
SGP | TDI | |
|---|---|---|
Setting | General practice (primary care) | Specialist care for substance use problems (secondary and tertiairy care) |
Study design | Sentinel surveillance by a sample of general practices | Register completed by caregivers from participating centres |
Data collection tools | Standard patient data form/questionnaire to complete by caregivers for every patient starting a new treatment episode | |
Data transfer | Postal mail, data entry by Sciensano | Online standard forms to transfer data record by record, or, repository tool to transfer patient data files for a given year |