Logistic regression: the independent effect of general practioner (GP), patient and encounter characteristics on the chance of a HIV test being ordered
| Predictor | Variable | Unadjusted for ‘opportunity to test’ ORs (95% Wald CIs) | Adjusted for ‘opportunity to test’ ORs (95% Wald CIs) |
| New patient | |||
| Versus seen previously | New patient | 1.92 (1.71 to 2.16) | 2.07 (1.84 to 2.34) |
| Indigenous patient versus non-Indigenous | Aboriginal | 2.03 (1.50 to 2.77) | 1.74 (1.26 to 2.41) |
| GP age | Under 35 | 1.74 (1.41 to 2.16) | 1.74 (1.44 to 2.11) |
| Versus 55+ | 35–44 | 1.74 (1.47 to 2.06) | 1.71 (1.46 to 2.01) |
| 45–54 | 1.24 (1.06 to 1.45) | 1.18 (1.02 to 1.37) | |
| Practice size | 2–4 GPs | 1.13 (0.92 to 1.38) | 1.18 (0.96 to 1.45) |
| Versus solo | 5+ GPs | 1.28 (1.05 to 1.56) | 1.31 (1.07 to 1.61) |
| Practice location | |||
| Versus non-major city | Major city | 1.41 (1.24 to 1.59) | 1.39 (1.23 to 1.57) |
| Practice accredited | |||
| Versus not accredited | Accredited | 1.31 (1.13 to 1.52) | 1.25 (1.08 to 1.44) |
| Patient gender | |||
| Versus female | Male | 1.49 (1.35 to 1.64) | 2.96 (2.66 to 3.29) |
| Patient age | |||
| Versus 15–24 y | 0–14 y | 0.03 (0.02 to 0.04) | 0.06 (0.04 to 0.09) |
| 25–44 y | 0.70 (0.63 to 0.78) | 0.57 (0.51 to 0.63) | |
| 45–64 y | 0.16 (0.14 to 0.18) | 0.13 (0.11 to 0.15) | |
| 65+ y | 0.02 (0.01 to 0.03) | 0.02 (0.02 to 0.04) | |
| GP gender | |||
| Versus male | Female | 1.40 (1.25 to 1.58) | – |
| GP FRACGP | |||
| Versus non-FRACGP | FRACGP | 1.14 (1.01–1.29) | – |
| ‘Opportunity to test*: risk’ | |||
| Versus no | Yes | N/A | 19.36 (17.39 to 21.57) |
| ‘Opportunity to test*: screening’ | |||
| Versus no | Yes | N/A | 10.63 (9.36 to 12.07) |
↵* Opportunity to test was defined as the patient attending for screening or was considered to be ‘at risk by the GP’—see methods for further details.
FRACGP, Fellowship of the Royal Australian College of General Practitioners.