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Table 3 Primary and secondary outcomes

From: Antithrombotic drugs do not increase intraoperative blood loss in emergency gastrointestinal surgery: a single-institution propensity score analysis

 Before matchingAfter matching
 ATControlp valueATControlp value
Subjects1701014 113113 
Intraoperative blood loss (ml)50 (210–10)10 (86–5)< 0.00160 (225–10)100 (243–10)0.433
Severe hemorrhage33 (19.4)137 (13.5)0.0325 (22.1)22 (19.5)0.743
Blood transfusion      
Red Blood Cell36 (21.2)123 (12.1)0.00227 (23.9)18 (15.9)0.182
 Amount (units)0 (0–0)0 (0–0)0.0020 (0–0)0 (0–0)0.127
Fresh Frozen Plasma30 (17.6)74 (7.3)< 0.00119 (16.8)15 (13.3)0.577
 Amount (units)0 (0–0)0 (0–0)< 0.0010 (0–0)0 (0–0)0.430
Platelet8 (4.7)22 (2.2)0.0637 (6.2)2 (1.8)0.171
 Amount (units)0 (0–0)0 (0–0)0.0510 (0–0)0 (0–0)0.090
Bleeding events7 (4.1)25 (2.5)0.2065 (4.4)2 (1.8)0.446
Thrombotic events4 (2.4)21 (2.1)0.7732 (1.8)3 (2.7)1.000
Mortality16 (9.4)35 (3.5)0.00111 (9.7)5 (4.4)0.193
Operative time (min)101 (149–73)90 (127–65)< 0.00199 (150–72)117 (151–77)0.244
Length of stay (days)21 (33–13)6 (19–10)< 0.00121 (33–13)16 (29–11)0.060
Other complications      
 Surgical site infection33 (19.4)133 (13.1)0.03226 (23.0)29 (25.7)0.757
 Abscess20 (11.8)112 (11.0)0.79214 (12.4)18 (15.9)0.568
 Pneumonia21 (12.4)43 (4.2)< 0.00115 (13.3)9 (8.0)0.280
  1. Data are presented as number (percentage) or median (interquartile)
  2. One unit of red blood cells, fresh frozen plasma, and platelet are approximately 120 cc, 120 cc, and 20 cc, respectively
  3. AT antithrombotic drug group