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Table 1 Preoperative patients' characteristics, operative surgical data, and post-operative outcome data.

From: Predictors of packed red cell transfusion after isolated primary coronary artery bypass grafting – The experience of a single cardiac center: A prospective observational study

Variable Total Transfusion No Transfusion P Value
Gender Male 97 (92.4%) 63 (88.7%) 34 (100%) 0.1002
  Female 8 (7.6%) 8 (11.3%) 0 (0%)  
Age (years) Mean ± SD 58.28 ± 10.97 60.46 ± 10.69 53.73 ± 10.36 0.0028
  ≤ 65 years 76 (72.4%) 47 (66.2%) 29 (85.3%) 0.0405
  > 65 years 29 (27.6%) 24 (33.8%) 5 (14.7%)  
Weight (Kg) Mean ± SD 72.67 ± 14.81 69.76 ± 12.05 78.74 ± 18.10 0.0032
  ≤ 70 51 (48.6%) 43 (60.6%) 8 (23.5%) 0.0003
  > 70 54 (51.4%) 28 (39.4%) 26 (76.5%)  
B.S.A. (Kg/m2) Mean ± SD 1.75 ± 0.15 1.72 ± 0.15 1.79 ± 0.11 0.0249
  ≤ 1.75 55 (52.4%) 43 (60.6%) 12 (35.3%) 0.0152
  > 1.75 50 (47.6%) 28 (32.4%) 22 (64.7%)  
B.M.I. Mean ± SD 27.07 ± 4.18 26.39 ± 4.52 28.49 ± 2.96 0.0155
  ≤ 25 35 (33.3%) 31 (43.7%) 4 (11.8%) 0.0011
  > 25 70 (66.7%) 40 (56.3%) 30 (88.2%)  
Hb (gm/dL) Mean ± SD 13.59 ± 1.52 13.31 ± 1.59 14.18 ± 1.18 0.0055
  ≤ 13 39 (37.1%) 31 (43.7%) 8 (23.5%) 0.0457
  > 13 66 (62.9%) 40 (56.3%) 26 (76.5%)  
Hct (%) Mean ± SD 39.18 ± 4.00 38.42 ± 4.07 40.99 ± 3.21 0.0062
  ≤ 40 52 (49.5%) 42 (59.2%) 10 (29.4%) 0.0043
  > 40 53 (50.5%) 29 (60.8%) 24 (70.6%)  
Creatinine (μmol/L) Mean ± SD 106.79 ± 83.58 106.63 ± 53.82 107.12 ± 125.98 0.9780
  ≤ 100 74 (70.5%) 44 (62%) 30 (88.2%) 0.0057
  > 100 31 (29.5%) 27 (38%) 4 (11.8%)  
Type of surgery On-pump 48 (45.7%) 41 (57.7%) 7 (20.6%) 0.0003
  Off-pump 57 (54.3%) 30 (42.3%) 27 (79.4%)  
Use of RA 70/105 (66.7%) 53/71 (74.6%) 17/34 (50%) 0.0121
Number of distal anastmoses 3.02 ± 0.88 3.14 ± 0.88 2.76 ± 0.82 0.0390
CPB time (min) 99.53 ± 24.13 104.85 ± 24.88 98.60 ± 24.22 0.4731
Ao × time (min) 62.85 ± 21.06 64.74 ± 19.87 51.85 ± 25.86 0.1347
Intubation time (hours) 29.24 ± 78.06 37.11 ± 94.28 13.03 ± 5.680 0.03674
CSU stay (days) 7.31 ± 15.40 7.54 ± 16.25 6.85 ± 13.66 0.8227
Hospital stay (days) 9.19 ± 6.82 9.90 ± 8.08 7.67 ± 1.77 0.0294
Postoperative blood loss     
Mean ± SD 883.59 ± 632 1005 ± 727 632 ± 207 0.0043
≤ 1000 mL 78 (74.3%) 46 (64.8%) 32 (94.1%) 0.0012
> 1000 mL 27 (25.7%) 25 (35.2%) 2 (5.9%)  
  1. Data are presented as mean ± SD or No. (%).
  2. B.S.A.: Body Service Area. B.M.I.: Body Mass Index.
  3. Hb: Hemoglobin. Hct: Hematocrit.
  4. RA: Radial Artery.
  5. CPB time: Cardiopulmonary Bypass time.
  6. Ao × time: Aortic cross clamp time. CSU: Cardiac Surgery Unit.