Table 1 Means, percentages and post-hoc results for the clusters

Practice characteristics used in cluster analyses

The IT systems I use are very helpful in day-to-day practice†

2.87

3.26

3.15

1.18

3.22

3.09

2.98

2,3,5 > 1,7 > 4,2,5 > 6 > 4

My patients have unrealistic expectations about how I can help them†

2.19

1.38

2.61

2.34

3.19

1.42

2.21

5 > 3 > 1,4,7 > 2,6

The majority of my patients have complex health and social problems†

3.01

3.27

3.29

3.09

3.16

1.41

2.64

2,3 > 1,4 > 7 > 6,5 > 6,7

The hours I work are unpredictable†

2.03

0.95

3.26

1.59

1.13

0.98

1.29

3 > 1 > 4 > 5,7 > 2,6

Weighted GPs †

1.51

4.70

4.38

4.55

4.51

4.72

11.95

7 > 2,3,4,5,6 > 1

Nurse to GP ratio†

2.44

0.48

0.53

0.49

0.49

0.46

0.37

1 > 2,3,4,5,6 > 7

Administration staff to GP ratio†

3.34

1.10

1.21

1.06

1.15

1.14

0.78

1 > 2,3,4,5,6 > 7

Percentage of patients bulk billed†

75.55

56.55

62.61

71.85

61.30

49.69

66.55

1,4 > 2,3,5 > 6,7 > 2 > 6

Collocated†

39.1%

43.7%

40.2%

43.5%

40.1%

44.2%

68.2%

On-call†

70.9%

45.4%

71.5%

47.5%

47.7%

40.9%

63.4%

Other practice characteristics

Remoteness

  City

33.3%

62.6%

46.1%

60.5%

65.8%

68.0%

72.9%

  Inner regional

22.2%

25.6%

31.7%

23.1%

22.2%

18.6%

18.5%

  Outer regional

44.4%

11.8%

22.2%

16.4%

12.0%

13.4%

8.6%

Hospital

35.5%

21.0%

47.5%

22.8%

21.1%

20.1%

22.9%

Full Time GPs (zeroed)

0.92

2.81

2.97

2.69

2.72

2.79

8.84

7 > 2,3,4,5,6 > 1

Part Time GPs (zeroed)

0.99

3.14

2.34

3.09

3.00

3.22

5.17

7 > 2,4,5,6 > 3 > 1

Number of allied health professionals

2.47

1.40

1.23

1.68

1.21

1.18

2.40

7 > 2,3,4,5,6,1 > 2,3,5,6

Number of administration

4.63

4.87

4.90

4.48

4.80

4.98

9.27

7 > 1,2,3,4,5,6

Number of nurses

3.71

2.24

2.24

2.23

2.18

2.12

4.35

1,7 > 2,3,4,5,6

Number of other staff

3.32

1.55

1.44

2.67

1.67

1.05

3.38

1,4,7 > 2,3,5,6

Male GPs

64.5%

44.9%

63.0%

53.5%

47.3%

48.4%

59.9%

Age

  44 or under

38.6%

33.3%

24.7%

31.9%

37.3%

44.5%

34.8%

  45-59

39.4%

51.5%

59.6%

47.4%

49.6%

42.3%

50.8%

  60+

22%

15.1%

15.7%

20.8%

13.2%

13.5%

14.4%

Job Aspects

The balance between my personal and professional commitments is about right

1.94

2.56

1.63

2.09

2.06

2.68

2.31

2,6 > 4,5,7 > 3,2,6 > 1

Running my practice is stressful most of the time

2.26

1.87

2.76

2.32

2.42

1.52

1.93

3 > 4,5 > 2,7 > 6,3 > 1 > 2 > 6

Total hours worked per week

47.98

35.99

48.61

38.44

39.06

35.29

38.62

1,3 > 2,4,5,6,7

Outcomes

Job satisfaction

30.41

32.76

28.94

28.89

30.27

32.55

31.03

2,6,7 > 3,4,5; 2 > 7

Self-rated general health (reverse-scored; low = healthier) ^b

1.13

0.89

1.20

1.17

1.13

0.86

1.03

3,4,5 > 2,6

Tenure (years, excl. years tenure = 0)

8.99

10.18

12.33

9.98

10.08

8.16

9.26

3 > 2,4,5,6,7

Number of GPs in cluster

110

535

478

324

461

548

314