Table 1.
Background characteristics
| Characteristics of the clinics N=18 |
Characteristics of the GPs N=20 |
Characteristics of the patients N=574* |
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| Location in Denmark | Age | Age | |||
| North Denmark Region | 4 (22.2) | <40 years | 2 (10.0) | <30 years | 98 (17.1) |
| Central Denmark Region | 3 (16.7) | 40–50 years | 14 (70.0) | 30–50 years | 198 (34.5) |
| Region of Southern Denmark | 5 (27.8) | 51–60 years | 3 (15.0) | 51–70 years | 188 (32.8) |
| Region Zealand | 2 (11.1) | >60 years | 1 (5.0) | >70 years | 90 (15.7) |
| Capital Region of Denmark | 4 (22.2) | Mean: 46.2 (95% CI 43.2 to 49.1) years | Mean: 49.7 (95% CI 48.2 to 51.1) years | ||
| Location classified by the GP | Gender | Gender | |||
| Urban | 10 (55.6) | Male | 14 (70.0) | Male | 191 (33.3) |
| Mixed | 6 (33.3) | Female | 6 (30.0) | Female | 383 (66.7) |
| Rural | 2 (11.1) | ||||
| Practice size | Experience as a general practitioner | ||||
| <2000 patients | 3 (16.7) | <10 years | 12 (60.0) | ||
| 2000–5000 patients | 9 (50.0) | 10–20 years | 7 (35.0) | ||
| >5000 patients | 6 (33.3) | >20 years | 1 (5.0) | ||
| Type of practice | Experience using ultrasonography | ||||
| Partnership practice | 15 (83.3) | <2 years | 6 (30.0) | *For comparison, excluded patients (n=117) were 29.1% male and with a mean age of 43.2 (95% CI 38.9 to 47.5) years. | |
| Solo-practice | 1 (5.5) | 2–5 years | 11 (55.0) | ||
| Collaboration practice | 2 (11.1) | >5 years | 3 (15.0) | ||
Number (percentage) of the total number of participants in each group (N).