Clinical Study

Incidence and Risk Factors of Early Delirium after Cardiac Surgery

Table 2

Univariate analysis of intraoperative risk factors for delirium development after cardiac surgery.

VariableD ( )ND ( ) Univariate analysis, OR (95% CI)

Duration of anesthesia (h)5.31 (±1.17)4.51 (±1.04)0.0191.18 (1.06–2.97)
Duration of surgery (h)4.52 (±1.15)3.76 (±0.97)0.0171.82 (1.02–3.12)
Duration of CPB (min)132.67 (±39.05)119.46 (±44.45)0.3460.99 (0.98–1.01)
Aortic cross-clamp time (min)60.06 (±18.03)75.98 (±30.90)0.4840.99 (0.97–1.01)
Minimal temperature (°C)29.75 (±2.92)31.31 (±3.07)0.1071.00 (0.99–1.00)
MAP (mm Hg)58.07 (±13.94)63.11 (±9.79)0.1291.04 (0.99–1.10)
Lactate levels (mmol/L)1.78 (±0.79)1.31 (±0.61)0.0232.50 (1.07–5.84)
Reinstitution of CPB 25.00%3.00%0.0233.00 (2.59–73.91)
Inotropes after CPB97.40% 51.70%0.0536.14 (0.75–50.50)

D: delirium group; ND: non-delirium group; OR: odds ratio; CI: confidence interval; CPB: cardiopulmonary bypass; MAP: mean arterial pressure; SaO2: arterial oxygen saturation; SBE: standard base excess.