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Table 3 Univariate analysis in postoperative hypoxemia

From: Risk factors for postoperative hypoxemia in patients undergoing Stanford A aortic dissection surgery

Characteristics Hypoxemia group Non-hypoxemia group P value
Age (years), mean (sd) 51.70 (9.16) 51.15 (8.74) NS
Gender (male) (%) 50 50 NS
Height (cm), mean (sd) 168.26 (8.48) 170.11 (9.10) NS
Weight (cm), mean (sd) 72.48 (15.16) 69.44 (15.22) NS
BMI (kg/m2), mean (sd) 25.55 (4.69) 23.83 (4.12) P=0.008
History of smoking (%) 57.4 42.6 NS
Acute onset (%) 56.2 43.8 P=0.000
Preoperative hypoxemia (%) 76.1 23.9 P=0.000
History of previous cardiac operation (%) 25 75 NS
Preoperative LVEF (%), mean (sd) 56.50 (5.55) 54.60 (8.94) NS
Hypertension (%) 53.3 46.7 NS
Diabetes mellitus (%) 80 20 NS
CPB time (min), mean (sd) 185.50 (37.61) 184.21 (36.24) NS
AO time (min), mean (sd) 94.86 (33.97) 93.35 (35.33) NS
CA time (min), mean (sd) 29.29 (10.29) 23.17 (8.54) P=0.000
Postoperative LVEF<40% (%) 66.7 33.3 NS
mechanical ventilation duration (hour), mean (sd) 79.22 (62.31) 41.45 (5.54) NS
Postoperative transfusion ≥3000 ml (%) 76.1 23.9 P=0.000
  1. BMI-body mass index, LVEF-left ventricular ejection fraction.
  2. CPB-cardiopulmonary bypass AO-aortic clamping.
  3. CA- circulatory arrest.
  4. m(sd)—mean(standard deviation).