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Table 2 Surgical characteristics

From: Is preoperative anxiety associated with postoperative delirium in older persons undergoing cardiac surgery? Secondary data analysis of a randomized controlled trial

  Sample n = 190 Delirious n = 78 Non-delirous n = 112 OR (95% CI)
EuroSCORE II, median (IQR) 3.9 (5.3) 6.1 (5.8) 3.3 (4.3) 1.13 (1.06–1.21)
Type of surgery n (%)
 Valve 185 (97.4) 75 (96.2) 110 (98.2) 0.45 (0.07–2.79)
 CABG 75 (39.5) 37 (47.4) 38 (33.9) 1.75 (0.97–3.18)
Combined surgery, n (%) 72 (37.9) 35 (44.8) 37 (33.0) 1.65 (0.91–2.99)
Time on cardiopulmonary bypass (min), mean (SD) 120.0 (43.0) 130.4 (48.0) 112.6 (37.9) 1.01 (1.00–1.02)
Duration of anaesthesia (min), mean (SD) 283.0 (75.5) 303.3 (83.7) 268.7 (65.8) 1.01 (1.00–1.01)
Total morphine dose (μg) intraoperative, mean (SD) 4385.1 (1546.0) 4626.2 (1677.6) 4220.0 (1433.6) 1.01 (1.00–1.01)
Total sedation dose (mg) intraoperative, mean (SD) 878.2 (335.7) 901.9 (371.1) 861.8 (309.4) 1.00 (0.99–1.01)
Red blood cell transfusion (ml) intraoperative, median (IQR) 254 (525) 272.5 (565) 248 (520.5) 1.00 (0.99–1.01)
Mean cardiac output (l/min) intraoperative, mean (SD) 4.2 (1.5) 4.4 (2.0) 4.2 (0.9) 1.10 (0.88–1.36)
Use of inotropic medication (Yes) intraoperative, n (%) 108 (56.8) 47 (60.3) 61 (54.5) 1.27 (0.71–2.28)
Highest intraoperative temperature (°C), mean (SD) 36.6 (0.4) 36.5 (0.4) 36.6 (0.4) 0.76 (0.37–1.54)
Mean arterial pressure (mm Hg) intraoperative, mean (SD) 75.0 (9.2) 74.9 (9.2) 75.0 (9.3) 0.99 (0.97–1.03)
Lowest haemoglobin value (g/dL) intraoperative, mean (SD) 9.5 (1.0) 9.4 (1.1) 9.6 (0.9) 0.82 (0.61–1.10)
Highest urea value (mg/dL) interoperative, median (IQR) 36 (17) 38 (19) 35 (15) 1.01 (0.99–1.02)
Length of stay in the intensive care unit (hours), median (IQR) 48.1 (68.7) 49.9 (68.6) 47.4 (69) 1.0 (0.99–1.01)
Postoperative infection (Yes), n (%) 43 (22.6) 25 (32.1) 18 (16.1) 2.46 (1.23–4.93)
  1. Legend: EuroSCORE II European System for Cardiac Operative Risk Evaluation II, CABG Coronary Artery Bypass Grafting, IQR interquartile range