Clinical Study

Complex Assessment of the Incidence and Risk Factors of Delirium in a Large Cohort of Cardiac Surgery Patients: A Single-Center 6-Year Experience

Table 1

Characteristics of the study group.

Demographic features
Male gender (n, %)4031 (69.7%)
Age (years)
Body mass index (kg/m²)27.5 (24.9; 30)

Clinical features
Hypertension (n, %)4101 (71%)
Diabetes (n, %)1447 (25%)
Atrial fibrillation (n, %)673 (11.6%)
Previous myocardial infarction (n, %)2340 (40.5%)
Previous percutaneous coronary intervention
(n, %)
821 (14.2%)
Previous coronary artery bypass grafting (n, %)16 (0.2%)
Carotid artery stenosis (n, %)974 (7.9%)
Peripheral artery disease (n, %)810 (14%)
Pacemaker/implantable cardioverter-defibrillator (n, %)50 (0.86%)
Chronic kidney disease (n, %) 147 (2.5%)
 Renal replacement therapy (n, %)38 (0.6%)
Chronic obstructive pulmonary disease (n, %)219 (3.8%)
Smoking habit (n, %)1738 (30%)
Neurologic diseases (n, %)851 (14.7%)
 Stroke/transient ischemic attack (n, %)303 (5.2%)

Coronary angiography findings
Coronary artery disease (n, %)4776 (82.6%)
(1) Vessel disease2694 (46.6%)
(2) Vessel disease1937 (33.5%)
(3) Vessel disease 1150 (19.9%)
Left main artery stenosis (n, %)741 (12.8%)

Echocardiographic features
Left ventricular ejection fraction (%)
 Good (n, %)2858 (49.4%)
 Moderate (n, %)1215 (21.0%)
 Poor (n, %)1708 (29.6%)
Mitral valve insufficiency (n, %)1020 (17.6%)
Mitral valve stenosis (n, %)247 (4.3%)
Tricuspid valve insufficiency (n, %)297 (5.1%)
Aortic valve insufficiency (n, %)603 (10.4%)
Aortic valve stenosis (n, %)573 (9.9%)

Laboratory findings
Hemoglobin (g/dL)
Hematocrit (%)
Fasting glucose level (mg/dL)103 (91; 128)
Oxygen partial pressure (mmHg)

Major hemodynamic features
Heart rate (1/min)
Systolic blood pressure (mmHg)
Diastolic blood pressure (mmHg)