Table 1.

Dimensions (4) and items (21). Survey to 930 personnel in primary care (850-930 observations).

Question	Dimensions with definitions and items
	Dimension 1: Patient-provider level (7 items)
	Definition: The knowledge and information required in the meeting (doctor’s own knowledge or knowledge about the patient’s medication received from other health care professionals), the quality of the communication and the degree of understanding each other.
Q13	How large of a problem do you think lack of communication between groups of personnel is for medication errors?
Q12	How large risk do you believe lack of education is for medication errors?
Q28	How large risk do you believe bad consultation technique is for medication errors?
Q15	How large of a problem do you think lack of communication between personnel and patients is for medication errors?
Q34	How large of a problem do you think lack of communication between personnel and patients is for diagnostic errors?
Q30	How large of a problem do you think lack of knowledge is for diagnostic errors?
Q51	How large of a problem do you think lack in language skills in patients or personnel is for diagnostic errors?
	Dimension 2: Support systems for every day clinical work (5 items)
	Definition: Peer support/Communication with other health care professionals, interprofessional rounds. Incident reporting and feed-back regarding both medication errors and diagnostic errors. Using knowledge support systems in order to establish the correct diagnosis.
Q19	How large of a problem do you think it is to lack routines for incident reporting and feedback for medication errors?
Q40	How large of a problem do you think it is to lack routines for incident reporting and feedback for diagnostic errors?
Q32	How large of a problem do you think lack of communication between groups of personnel is for diagnostic errors?
Q33	How important do you think interprofessional rounds are to prevent diagnostic errors?
Q49	How large of a problem do you think it is with underuse of knowledge support systems for diagnostic errors?
	Dimension 3: Shared information and cooperation between different caregivers. (4 items)
	Definition: Transfer of care and cooperation between primary and secondary care. The existence of a nationwide online medication record, accessible for primary care, secondary care and the patient.
Q22	How large of a risk for medication errors do you think it is with poor cooperation between secondary and primary care?
Q45	How large of a risk for diagnostic errors do you think it is with poor cooperation between secondary and primary care?
Q21	How large of a risk for medication errors do you think it is that there is not at nationwide online medication record that all stakeholders can access?
Q44	How large of a risk for diagnostic errors do you think it is that there is not at nationwide online medication record that all stakeholders can access?
	Dimension 4: Risks in the environment/in the work conditions (5 items)
	Definition: Stress and lack of time. High work load. Poor continuity of care.
Q17	How large of a problem do you think stress/lack of time is for medication errors?
Q37	How large of a problem do you think stress/lack of time is for diagnostic errors?
Q18	How large of a problem do you think high work load is for medication errors?
Q26	How large of a risk do you think it is with poor continuity of care when it comes to medication errors?
Q47	How large of a risk do you think it is with poor continuity of care when it comes to diagnostic errors?