Table 1.

Tools used in the studies.

	Tool	Reference a
Nursing Overload.	Qualitative interview.	[12,26,35]
	Specific questionnaires of each study	[6,8,10,11,23]
	EIPST, EACT	[12]
	No tool used	[1,2,7]
Burnout/Effects on Nursing Health.	Maslach	[38,39,40,41,42,43,44,45,47]
	WHQOL-100	25
	Specific questionnaires of each study	[6,10,24,36,39], [40] (3 questionnaires), [44] (3 questionnaires), [45]
	No tool used	[1]
Patient Safety.	Qualitative interview	[12]
	Qualitative interview	[12,13]
	No tool used	[2]
Quality of Care.	Delphi technique	[28]
	Specific questionnaires of each study	[6,8,30]
	Qualitative interview	[3]
	EUROPEP	[33]
	SAQ	[30]
	Specific questionnaires of each study	[6,8]
	No tool used	[1,2]

^a The numbering corresponds with the citation in the text.