Exploring the black box of quality improvement collaboratives: modelling relations between conditions, applied changes and outcomes

Table 2 The means, medians, inter-quartile ranges (IQR) and ranges of the six variables

Variable name:	N	Mean	Median	IQR	Min-Max
External change agent support¹	168	4.56	4.65	1.46	1.50-6.75
Team organisation²	168	5.27	5.40	1.20	1.60-7.00
Organisational support³	168	4.60	4.78	1.75	1.40-7.00
Number of applied changes	159	3.73	4.00	2.00	0.00-8.00
Perceived success (overall judgement project leader)	137	6.69	7.00	2.00	1.00-9.00
Actual success (performance indicator)	103	2.28	3.00	2.00	1.00-3.00

¹ Items: at collaborative meetings I always gain valuable insights, and external change agents a) provide sufficient support and instruments; b) raise high expectations about performance and improvement potential; c) make clear from the beginning what the goal of the project is and the best way to achieve it; Cronbach's alpha: 0.77.
² Items: good communication and coordination, clear division of tasks, everyone is doing what he or she should do, team is responsible and in charge of implementation; Cronbach's alpha: 0.84.
³ Items: project is important to strategic management, strategic management supports project actively, hospital gives support needed in the department(s) to make the project a success, board does everything in its power to increase the willingness to change and pays attention to the activities of the project team; Cronbach's alpha: 0.91.

ISSN: 1748-5908