Systematic review of factors influencing length of stay in ICU after adult cardiac surgery

Table 5 Newcastle-Ottawa: case-control studies

Study	Selection										Comparability		Exposure										Total
	Case definition			Representativeness of the cases		Selection of controls			Definition of controls		Confounding factors		Ascertainment of exposure					Same method of ascertainment for case and controls		Non-response rate
	A*	B	C	A*	B	A*	B	C	A*	B	A*	B*	A*	B	C	D	E	A*	B	A*	B	C
28. Graf, K., et al., Economic aspects of deep sternal wound infections.		+		+			+		+		+		+					+			+		5
29. Rosenfeld, R., et al., Predictors and outcomes of extended intensive care unit length of stay in patients undergoing coronary artery bypass graft surgery.		+		+			+		+		+		+					+			+		5

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