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Table 3 Comparison of postoperative complications and outcome indicators between the two groups

From: Effect of the COVID-19 pandemic on complications and mortality of patients with cardiac surgery

Characteristics Control group (n = 292) Observation group (n = 130) P-value
Ventilator assistance time (day) 1 (0.5–1) 1 (1–2) 0.000
Length of stay in the ICU (day) 2 (1–3) 4 (2–6) 0.000
Length of stay in the hospital (day) 12 (10–17) 17 (13–23) 0.000
Postoperative complications    
Infected person (%) 12 (4.11) 27 (20.77) 0.000
Atelectasis (%) 21 (7.19) 36 (27.69) 0.000
Pulmonary edema (%) 3 (1.03) 13 (10.00) 0.000
Gastrointestinal dysfunction (%) 9 (3.08) 28 (21.54) 0.000
Ventricular arrhythmia (%) 10 (3.42) 10 (7.69) 0.057
Atrial arrhythmia (%) 4 (1.37) 12 (9.23) 0.000
Secondary tracheal intubation (%) 8 (2.74) 16 (12.31) 0.000
Acute kidney injury (%) 7 (2.40) 13 (10.00) 0.001
Acute liver injury (%) 4 (1.37) 4 (3.08) 0.235
Coagulation disorders (%) 1 (0.34) 6 (4.62) 0.002
Stroke (%) 7 (2.40) 7 (5.38) 0.114
Delirium (%) 7 (2.40) 6 (4.62) 0.223
Secondary hemostasis (%) 5 (1.71) 2 (1.54) 0.897
Total blood transfusion (ml) 600 (400–1000) 1700 (920–3060) 0.000
Total mediastinal drainage (ml) 625 (372–1114) 980 (609–2481) 0.000
30-day mortality rate (%) 18 (6.16) 14 (10.77) 0.099
6 months mortality rate (%) 26 (8.90) 24 (18.46) 0.005