Box 3. Enrolment of general practitioners and recruitment of participants, by state.
| ACT | NSW | SA | Tasmania | Victoria | Total | P* | |
|---|---|---|---|---|---|---|---|
| Number of GPs (PCHRIS data) | 463 | 704 | 2140 | 594 | 6394 | 10 295 | |
| GPs contacted | 97 (21%) | 277 (39%) | 259 (12%) | 395 (66%) | 4805 (75%) | 5833 (57%) | |
| GPs enrolled | 91 (20%) | 251 (36%) | 245 (11%) | 238 (40%) | 1892 (30%) | 2717 (27%) | |
| Phone screens per GP, median (IQR)† | 13 (2–40) | 9 (1–29) | 15 (4–33) | 13 (3–29) | 14 (3–36) | 13 (2–34) | 0.035 |
| Patients included after phone screen per GP, median (IQR)† | 8 (4–17) | 5 (2–12) | 7 (3–12) | 9 (5–16) | 6 (3–12) | 6 (3–13) | < 0.001 |
| Randomised participants per GP, median (IQR)† | 3 (1–10) | 2 (0–6) | 3 (1–7) | 5 (1–11) | 2 (0–7) | 3 (0–8) | < 0.001 |
| Randomised participants (proportion of population)‡ | 679 (3%) | 1064 (1%) | 1365 (1%) | 2077 (5%) | 10 850 (2%) | 16 035 (2%) | |
| Enrolled GPs with at least one randomised participant | 71 (78%) | 168 (67%) | 1408 (74%) | 206 (87%) | 200 (82%) | 2053 (76%) |
IQR = interquartile range; PHCRIS = Primary Health Care Research and Information Service.
*
Differences between states: Kruskal–Wallis test.
†
Median number per enrolled GP per practice; 205 GPs were enrolled at more than one practice.
‡
668 participants were randomised without a linked enrolled GP (4% of all randomisations).