. 2015 Jun 30;12(2):126–133. doi: 10.5114/kitp.2015.52853

Tab. V.

Statistical comparison analysis of variables in both groups based on the incidence of postoperative delirium

Variable	n	Delirium, n (%)		No delirium, n (%)	Sig. P-value	Exp (B) OR	95% CI for Exp(B) OR
Variable	n	Control group	Melatonin group	No delirium, n (%)	Sig. P-value	Exp (B) OR	Lower	Upper
Incidence		20.8%	8.4%		0.001
Age (years)					0.001	1.098	1.063	1.134
Gender					0.432	1.252	0.714	2.197
EuroSCORE II					0.001	1.314	1.203	1.435
D. mellitus					0.516	1.188	0.706	2.000
Hypertension					0.218	1.942	0.675	5.583
Hypercholest.					0.709	0.898	0.508	1.584
Smoking					0.353	0.779	0.461	1.319
Alcoholism					0.829	1.101	0.460	2.637
Psych. disease					0.416	0.638	0.215	1.888
Operation type
CABG					0.003	2.385	1.355	4.198
OPCAB					0.547	0.771	0.331	1.798
AVR					0.409	1.248	0.737	2.112
MVR					0.132	1.695	0.852	3.372
AVR + MVR					0.248	1.342	0.815	2.208
CABG + AVR					0.018	2.698	1.186	6.138
CABG + MVR					0.010	2.224	1.210	4.090
CABG + AVR + MVR					0.010	2.224	1.210	4.090
CPB time					0.001	1.010	1.004	1.015
ACC time					0.008	1.009	1.002	1.016
Sufentanil d. (mg) > 0.15					0.001	5.679	2.591	12.446
Benzodiaz.					0.142	0.936	0.856	1.023
M. vent.					0.033	1.078	1.006	1.155
ICU stay					0.001	1.234	1.145	1.330
Hosp. stay					0.001	1.107	1.060	1.155

sig. – significant, Exp(B) – coefficient, OR – odds ratio, CI – confidence interval, D. – diabetes, Hypercholest. – hypercholesterolemia, Psych. – psychiatric, CABG – coronary artery bypass graft surgery, OPCAB – off-pump coronary artery bypass, AVR – aortic valve replacement, MVR – mitral valve replacement, CPB – cardio-pulmonary bypass, ACC – aortic cross-clamping, d. – dose, Benzodiaz. – benzodiazepine, M. vent. – mechanical ventilation, ICU – intensive care unit, Hosp. – hospitalization