Mixed effects model to investigate the relationship between PCP demographics and likelihood of immediate diagnostic action, adjusted for country
| Demographic factor | Margin (95% confidence interval) | Standard error |
| PCP gender | ||
| Female | 63.6 (58.9 to 68.3) | 2.4 |
| Male | 62.7 (57.9 to 67.6) | 2.5 |
| Years since graduation | ||
| Less than 10 | 56.1 (50.5 to 61.6) | 2.8 |
| 10–19 | 64.3 (59.2 to 69.3) | 2.6 |
| 20–29 | 63.6 (58.5 to 68.6) | 2.6 |
| 30–39 | 66.1 (61.0 to 71.3) | 2.6 |
| 40 or over | 66.3 (58.1 to 74.6) | 4.2 |
| Number of doctors in PCP’s practice | ||
| 1 | 64.8 (59.0 to 70.6) | 3.0 |
| 2 | 64.6 (58.6 to 70.5) | 3.0 |
| 3 | 62.4 (56.4 to 68.3) | 3.0 |
| 4–5 | 63.3 (57.8 to 68.7) | 2.8 |
| 6–7 | 60.8 (55.1 to 66.6) | 2.9 |
| 8–9 | 61.3 (54.9 to 67.7) | 3.3 |
| 10 or more | 63.9 (58.4 to 69.3) | 2.8 |
PCP, primary care practitioner.