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 4
Significant predictors of delirium in a bivariate analysis-quantitative variables.
| | Variable | Delirium (+) | Delirium (−) | “P” |
| | Patient-related conditions | | Age (years) | 69 (62; 74) | 63 (56; 70) | <0.001 | | EuroSCORE (points) | 7 (5; 9) | 5 (3; 8) | <0.001 | | Logistic EuroSCORE (%) | 5.68 (3.76; 9.91) | 3.29 (2.1; 5.7) | <0.001 | | Hemoglobin (g/dL) | 13.6 (12.2; 14.7) | 13.9 (12.9; 14.8) | 0.009 | | Hematocrit (%) | 39.8 (36.1; 42.6) | 40.9 (37.9; 45.5) | <0.001 | | Platelet count (1000/mm³) | 182 (148; 217) | 190 (157; 229) | 0.005 | | Fasting glucose level (mg/dL) | 120.5 (96; 161.5) | 103 (91; 126) | <0.001 | | Total protein (g/dL) | 6.89 (6.3; 7.22) | 7.08 (6.6; 7.4) | <0.001 | | Baseline K+ (mmol/L) | 3.91 (3.7; 4.16) | 3.82 (3.64; 4.06) | 0.002 | | Baseline Na+ (mmol/L) | 139.7 (138; 141) | 140 (138; 141.3) | 0.03 | | Diastolic pressure (mmHg) | 65 (60; 75) | 70 (60; 80) | 0.02 |
| | Procedure-related conditions | | Time of cardiopulmonary bypass (min) | 80 (62; 111) | 77 (59; 100) | 0.01 | | Lowest pO2 (mmHg) | 105.0 (79; 252) | 83.8 (73.5; 97) | <0.001 | | Lowest Na+ (mmol/L) | 136 (134; 138) | 137 (135; 139) | <0.001 | | Lowest K+ (mmol/L) | 3.78 (3.6; 4) | 3.7 (3.5; 3.9) | <0.001 | | ΔpH | 0.05 (0.018; 0.09) | 0.042 (0.007; 0.09) | 0.01 | | ΔpO2 (mmHg) | 19.2 (0; 164.7) | 0 (0; 25.2) | <0.001 | | ΔNa (mmol/L) | 3.1 (2; 5) | 3 (1; 4) | <0.001 | | ΔK (mmol/L) | 0.15 (0.04; 0.3) | 0.1 (0; 0.24) | <0.001 | | ΔHematocrit (%) | 14 (12; 17) | 13 (10; 16) | 0.09 |
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pO2: arterial oxygen partial pressure, Δ: intraoperative fluctuation (max − min).
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