Table 1

Background characteristics

Characteristics of the clinics
N=18
Characteristics of the GPs
N=20
Characteristics of the patients
N=574*
Location in DenmarkAgeAge
 North Denmark Region4 (22.2) <40 years2 (10.0) <30 years98 (17.1)
 Central Denmark Region3 (16.7) 40–50 years14 (70.0) 30–50 years198 (34.5)
 Region of Southern Denmark5 (27.8) 51–60 years3 (15.0) 51–70 years188 (32.8)
 Region Zealand2 (11.1) >60 years1 (5.0) >70 years90 (15.7)
 Capital Region of Denmark4 (22.2)Mean: 46.2 (95% CI 43.2 to 49.1) yearsMean: 49.7 (95% CI 48.2 to 51.1) years
Location classified by the GPGenderGender
 Urban10 (55.6) Male14 (70.0) Male191 (33.3)
 Mixed6 (33.3) Female6 (30.0) Female383 (66.7)
 Rural2 (11.1)
Practice sizeExperience as a general practitioner
 <2000 patients3 (16.7) <10 years12 (60.0)
 2000–5000 patients9 (50.0) 10–20 years7 (35.0)
 >5000 patients6 (33.3) >20 years1 (5.0)
Type of practiceExperience using ultrasonography
 Partnership practice15 (83.3) <2 years6 (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-practice1 (5.5) 2–5 years11 (55.0)
 Collaboration practice2 (11.1) >5 years3 (15.0)
  • Number (percentage) of the total number of participants in each group (N).