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Table 3 Transfusion rates and outcomes among elective cardiac surgery patients

From: Preoperative anemia and transfusion in cardiac surgery: a single-centre retrospective study

Transfusion Non-Anemic
(N = 678)
Anemic
(N = 119)
P value* Mild Anemic
(N = 80)
Moderate/Severe Anemic
(N = 39)
P value†
Transfusion rate 65 (10) 63 (53) < 0.0001 32 (40) 31 (79) < 0.0001
pRBC transfused    0.915    NA
 1 26 (40) 26 (41)   13 (41) 13 (42)  
 2 20 (31) 17 (27)   8 (25) 9 (29)  
 3 6 (9) 4 (6)   0 (0) 4 (13)  
 4 6 (9) 8 (13)   6 (19) 2 (6)  
 ≥ 5 7 (11) 8 (13)   5 (16) 3 (10)  
Outcomes
 Length of CVICU stay (d) 2 (1–4) 3 (1–6) 0.001 3 (1–6) 3 (2–6) 0.611
 Length of hospital stay (d) 7 (5–9) 10 (6–16) < 0.0001 9 (6–16) 10 (7–14) 0.319
 In-hospital mortality 8 (1) 11 (9) < 0.0001 6 (8) 5 (13) 0.501
  1. CVICU cardiovascular intensive care unit, d day, pRBC packed red blood cells, P value * p value between anemic and non-anemic groups, P value† p value between mild anemic and moderate/severe anemic groups