Table 3. Item and scale characteristics, internal consistency, reliability and item-total correlations, by profession.

Item nr	Scale and items	Factor loadings on primary scale		Internal consistency reliability: Cronbach’s α		Corrected item-total correlations
		Physicians	Nurses	Physicians	Nurses	Physicians	Nurses
	Improving Quality of Care (N = 2055/2769) 1			0.825	0.813
Q1	Physicians and nurses should be willing to work on quality improvement initiatives.	0.766	0.717			0.665	0.630
Q2	Physicians and nurses should initiate actions to improve daily practice.	0.798	0.751			0.701	0.664
Q3	Physicians and nurses should engage in ongoing self-evaluation.	0.748	0.749			0.694	0.682
Q4	Physicians and nurses should participate in peer evaluations of the quality of care provided by colleagues.	0.604	0.629			0.541	0.555
	Maintaining Professional Competence (N = 2056/2787) 1			0.668	0.664
PC1	Physicians and nurses should maintain competency in their area of practice.	0.738	0.681			0.560	0.530
PC2	Physicians and nurses should seek additional education to update knowledge and skills.	0.765	0.710			0.617	0.577
PC3	Physicians and nurses should undergo recertification/revalidation examinations periodically throughout their career.	0.349	0.411			0.294	0.337
	Fulfilling Professional Responsibilities (N = 2051/2780) 1			0.765	0.806
PR1	Physicians and nurses should disclose all significant medical errors to affected patients and/or guardians.	0.597	0.662			0.518	0.583
PR2	Physicians and nurses should report all significant medical errors they observe to hospital, clinic, or other relevant authorities.	0.758	0.783			0.650	0.702
PR3	Physicians and nurses should report all instances of significantly impaired or incompetent colleagues to hospital, clinic, or other relevant authorities.	0.735	0.724			0.635	0.647
PR4	Physicians and nurses should confront practitioners with questionable or inappropriate practice.	0.526	0.623			0.460	0.559
	Interprofessional Collaboration - Shared education and collaboration (N = 2039/2752) 1			0.780	0.771
IC1	Physicians should be educated to establish collaborative relationships with nurses.	0.738	0.765			0.609	0.628
IC2	Interprofessional relationships between physicians and nurses should be included in their educational programs.	0.745	0.764			0.615	0.634
IC3	Nurses should also have responsibility for monitoring the effects of medical treatment.	0.600	0.495			0.543	0.441
IC4	Nurses should clarify a physician’s order when they feel that it might have the potential for detrimental effects on the patient.	0.539	0.576			0.487	0.528
IC5	A nurse should be viewed as a collaborator and colleague with a physician rather than his/her assistant.	0.574	0.551			0.521	0.487
	Interprofessional Collaboration - Physician Authority (N = 2045/2763) 1			0.543	0.721
PA1	Doctors should be the dominant authority in all healthcare matters.	0.506	0.664			0.373	0.563
PA2	The primary function of the nurse is to carry out physician’s orders.	0.506	0.664			0.373	0.563
	Professional Behaviours
	Professional Quality Improvement Actions (N = 2026/2743) 2			0.505	0.492
QA1	In the last 3 years, have you participated in a formal error reduction initiative in your hospital?	0.506	0.477			0.353	0.327
QA2	In the last 3 years, have you reviewed medical/nursing records for quality improvement reasons?	0.523	0.508			0.375	0.364
QA3	In the last 3 years, have you undergone competency assessment by a professional society or other authority (i.e., insurance company)?	0.344	0.353			0.239	0.242

¹Sample size (for physicians/nurses), excludes respondents who are missing responses for >2 out of 5 professional attitudes subscales.

²Sample size for physicians/nurses.