Table 4. Observed and predicted mortality rates.

		%		Mean±SD
All patients (n=116)		STS		5.40±15.8
		EuroSCORE II		8.1 ±7.34
		Observed	276
Timing of operation	Elective (n=89)	STS		7.7±20.3
						EuroSCORE II		7.2±7.3
		Observed	21,3
					Urgent (n=27)	STS		2.0±1.0
		EuroSCORE II		9.5±7.5
					Operation type		Observed	48,1
	CABG (n=65)	STS		1.8±0.8
		EuroSCORE II		4.5±4.8
		18,5
Mitral valve surgery (n=20)	STS		6.3±176
	EuroSCORE II		5.2±7.2
	Observed	30
Aortic valve surgery (n=10)	STS		2.5±1.0
	EuroSCORE II		9.4±7.7
	Observed	60
Aortic valve + CABG (n=16)	STS		3.0±1.7
	EuroSCORE II		5.3±3.6
	Observed	33,3
Mitral valve + CABG (n=5)	STS		6.4±9.4
	EuroSCORE II		75±5.1
		60
SD: Standard deviation; STS: Society of thoracic surgeons; EuroSCORE II: European System for Cardiac Operative Risk Evaluation II; CABG: Coronary artery bypass grafting.