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Table 2 Preoperative routine investigations and operative data compared according to RDW level

From: Role of pre-operative red cell distribution width estimation in the prediction of in-hospital mortality after off-pump coronary artery bypass grafting

Variables Group A Group B Group C p value
Complete Blood Count
 Haemoglobin (gm/dL) 12.69 ± 1.54 12.60 ± 1.26 12.41 ± 1.45 0.612
 ESR (mm in 1st hour) 28.28 ± 16.91 30.11 ± 21.36 28.44 ± 17.68 0.878
 Platelet count (× 1012/L) 274.88 ± 71.59 261.86 ± 81.52 246.64 ± 78.09 0.162
 Total WBC count (× 109/L) 8.49 ± 2.25 8.54 ± 1.74 8.30 ± 2.07 0.866
 Neutrophil/lymphocyte ratio 2.12 ± 0.95 1.98 ± 0.79 2.12 ± 0.73 0.724
Absolute Indices
 PCV (%) 37.28 ± 4.19 37.68 ± 3.99 38.37 ± 3.98 0.402
 MCV (fL) 85.65 ± 5.02 83.18 ± 7.48 82.06 ± 7.90 0.014
 MCH (pg) 29.10 ± 2.63 27.65 ± 2.24 26.67 ± 3.52  < 0.001
 MCHC (pg) 33.80 ± 3.56 33.23 ± 1.49 32.13 ± 1.06 0.009
 MPV (fL) 10.00 ± 1.19 9.73 ± 1.61 9.32 ± 1.04 0.030
 PDW (fL) 12.69 ± 2.68 13.87 ± 2.72 16.23 ± 2.64  < 0.001
C-Reactive Protein (mg/L) 3.54 ± 4.06 5.24 ± 6.19 2.83 ± 3.02 0.082
RBS (mmol/L) 7.11 ± 2.61 8.47 ± 3.92 8.83 ± 4.22 0.340
Echocardiography
 LVEF (%) 54.54 ± 10.11 51.75 ± 10.33 56.33 ± 10.41 0.153
 RWMA 60 (80.0) 27 (75.0) 36 (92.3) 0.116
 Left Atrial size (mm) 33.31 ± 3.92 33.83 ± 4.67 34.10 ± 4.59 0.612
Operative data
 Number of distal anastomoses 2.79 ± 0.58 3.00 ± 0.63 3.18 ± 0.60 0.004
 Name of conduits used
  Internal mammary artery (left) 74 (98.7) 36 (100.0) 38 (97.4) 0.999
  Saphenous venous graft 73 (97.3) 36 (100.0) 39 (100.0) 0.738
  Radial artery 0 (0.0) 0 (0.0) 1 (2.6) 0.500
  1. Data are shown as Mean ± SD. Figure within parenthesis indicates percentage. p value < 0.05 is considered statistically significant
  2. ESR erythrocyte sedimentation rate, WBC white blood cell, PCV packed cell volume, MCV mean corpuscular volume, MCH mean corpuscular haemoglobin, MCHC mean corpuscular haemoglobin concentration, MPV mean platelet volume, PDW platelet distribution width, RBS random blood sugar, LVEF left ventricular ejection fraction, RWMA regional wall motion abnormality