Table 1 Characteristics of the included PCPs

Gender

 Male

6

 Female

3

Age group

  < 50 y

1

  50 – 59 y

6

 60 – 69 y

2

Experience (years since establishment)

  < 10 y

1

  10—14 y

1

 15—19 y

3

  > 20 y

4

Type of practice

 Single-handed

4

 Group practice

5

Area of practice

 Large city: > 100 000 inhabitants

1

 Medium-sized town: 20 000–100 000 inhabitants

1

 Small-sized town: 5000–20 000 inhabitants

6

 Rural community: > 5000 inhabitants

1

 Availability of exercise ECG

 Conducted in own practice

2

 Not available in own practice

7