Table 2

Result of factor analysis: distribution of factor loadings (restricted to loadings >0.3), interpretation of factors and result of internal consistency for each dimension (Cronbach's α)

Items	Components
Items	1	2	3	4	5	6	7
Factor 1. Teamwork climate (α=0.905)
12. Rely on each other	0.801
9. Quality of team coordination	0.758
13. Support from colleagues	0.743
14. Respect for team members	0.729
15. Constructive handling of conflicts	0.624
28. Participation of whole team in decisions on procedures and tasks	0.621						0.354
27. Clear responsibilities	0.606
10. No inhibition about asking questions	0.568
26. Coordination of practice procedures	0.552						0.482
11. Awareness when colleagues are under excessive pressure	0.513				0.372
34. Timely information about events that affect my work	0.412						0.307
37. Team briefings about ongoing tasks in practice	0.447	0.542					0.309
Factor 2. Error management (α=0.798)
48. Information provided on results of incident investigation		0.722
46. Practice team discusses patient safety incidents		0.658
47. Patient safety incidents are investigated		0.649
45. Encouraged to report patient safety incidents		0.645
50. Implementation of preventive actions after patient safety incidents		0.495	0.442
52. Importance of finding the cause, not who made the mistake	0.353	0.452
49. Reporting system for errors in use		0.426
Factor 3. Safety of clinical processes (α=0.674)
35. Patient information flows smoothly between practice and specialists			0.682
36. Important patient information available			0.623
31. Management of laboratory test results			0.565
33. Adherence to rules for prescribing procedures			0.499
Factor 4. Perception of causes of errors (α=0.71)
62. Impact of fatigue or workload on individual performance			−0.341	0.699
61. Impact of hostile or tense environment on individual performance			−0.388	0.644
60. Impact of personal problems on individual performance				0.614
59. Organisation the cause of errors				0.588
56. Breakdown of information the cause of errors				0.556
57. Carelessness the cause of errors				0.441		−0.365
Factor 5. Job satisfaction (α=0.768)
18. Importance of working in this particular practice					0.720
19. Quality of practice as workplace	0.372				0.685
20. Job satisfaction			0.393		0.588
Factor 6. Safety of practice structure (α=0.552)
5. Regular maintenance of technical equipment						0.566
30. Expiry dates checked regularly	0.336					0.515
55. Priority of patient safety in this practice						0.462
6. Medical equipment appropriate						0.400
Factor 7. Receptiveness to healthcare assistants and patients (α=0.639)
29. Procedures designed optimally for patients							0.587
40. Patients' suggestions welcome							0.483
8. Suggestions welcome from healthcare assistants	0.391				0.382		0.415
Factor 8. Staff perception of management (α=0.753) (result of a separate factor analysis, no rotation after initial extraction, since only one component extracted)
71. Practice management considers staff interests	0.849
70. Practice management fair to staff	0.847
73. Model behaviour of practice management towards patients	0.640
69. Feedback on individual performance provided	0.613
72. Difficult to express differing opinion to practice management (reverse coded for analysis)	0.588
Factor 9. Quality and safety of medical care (α=0.563) (result of a separate factor analysis, no rotation after initial extraction, since only one component extracted)
66. Patients regularly asked about drug side effects	0.824
65. Control of medication plan	0.739
64. Adherence to clinical guidelines	0.622

The completely translated items are displayed in table AI.