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Table 2 Operative and post-operative characteristics (management and laboratory) of coronary artery bypass patients according to neutrophil lymphocyte ratios (NLR) and surgical approach (MICS vs. Sternotomy CABG)

From: Elevated preoperative neutrophil/lymphocyte ratio as a predictor of increased long-term survival in minimal invasive coronary artery bypass surgery compared to sternotomy

Variables NLR <2.3 (N = 371) p Value 2.3 ≤ NLR ≤ 3.4 (N = 375) p Value NLR >3.4 (N = 380) p Value
  Sternotomy CABG MICS   Sternotomy CABG MICS   Sternotomy CABG MICS  
n 242 129   245 130   243 137  
In-hospital medication         
Aspirin 238 (98.3%) 128 (99.2%) 0.66 234 (95.9%) 130 (100%) 0.02 237 (97.5%) 137 (100%) 0.09
Clopidogrel 110 (45.5%) 111 (86.0%) <0.001 128 (52.5%) 115 (88.5%) <0.001 120 (49.4%) 116 (84.7%) <0.001
Beta-blockers 232 (95.9%) 124 (96.1%) 0.91 230 (94.3%) 128 (98.5%) 0.06 231 (95.1%) 135 (98.5%) 0.08
Angiotensin convertase inhibitor 84 (34.7%) 44 (34.1%) 0.91 96 (39.3%) 31 (23.8%) 0.00 104 (42.8%) 45 (32.8%) 0.06
Angiotensin receptor blocker 29 (12.0%) 13 (10.1%) 0.58 17 (7.0%) 13 (10.0%) 0.30 19 (7.8%) 17 (12.4%) 0.14
Warfarin 18 (7.4%) 7 (5.4%) 0.46 18 (7.4%) 8 (6.2%) 0.66 26 (10.7%) 9 (6.6%) 0.18
Statin 232 (95.9%) 127 (98.4%) 0.23 229 (93.9%) 126 (96.9%) 0.20 228 (93.8%) 132 (96.4%) 0.29
Medication on discharge         
Aspirin 237 (98.3%) 125 (97.7%) 0.70 234 (95.9%) 127 (97.7%) 0.56 230 (95.4%) 131 (97.8%) 0.26
Clopidogrel 66 (27.4%) 101 (78.9%) <0.001 83 (34.0%) 105 (80.8%) <0.001 64 (26.6%) 104 (77.6%) <0.001
Beta-blockers 212 (88.0%) 114 (89.1%) 0.76 216 (88.5%) 117 (90.0%) 0.66 208 (86.3%) 123 (91.8%) 0.11
Angiotensin convertase inhibitor 70 (29.0%) 32 (25.0%) 0.41 67 (27.5%) 24 (18.5%) 0.05 75 (31.1%) 27 (20.1%) 0.02
Angiotensin receptor blocker 1 (0.4%) 4 (3.1%) 0.05 4 (1.7%) 1 (0.8%) 0.66 2 (0.8%) 7 (5.2%) 0.01
Warfarin 30 (12.4%) 17 (13.3%) 0.82 27 (11.1%) 12 (9.2%) 0.58 43 (17.8%) 11 (8.2%) 0.01
Statin 220 (91.3%) 119 (93.0%) 0.57 222 (91.0%) 120 (92.3%) 0.66 218 (90.5%) 123 (91.8%) 0.67
Operative data          
Internal mammary artery utilized 231 (95.5%) 127 (98.4%) 0.23 230 (94.3%) 128 (97.7%) 0.13 221 (90.9%) 134 (97.8%) 0.01
Number of conduits used for bypass 3.28 ± 0.991 2.12 ± 0.673 <0.001 3.26 ± 0.886 2.28 ± 0.806 <0.001 3.12 ± 0.910 2.17 ± 0.753 <0.001
Cardiopulmonary bypass 27 (11.2%) 6 (4.7%) 0.04 30 (12.3%) 7 (5.3%) 0.03 18 (7.4%) 8 (5.8%) 0.56
Postoperative complications         
Renal Failure on Dialysis 1 (0.4%) 2 (1.6%) 0.28 3 (1.2%) 4 (3.1%) 0.25 12 (4.9%) 3 (2.2%) 0.19
New onset atrial fibrillation 33 (13.6%) 22 (17.1%) 0.38 40 (16.4%) 30 (22.9%) 0.12 48 (19.8%) 43 (31.4%) 0.01
Septicemia 0 (0%) 5 (3.9%) 0.005 0 (0%) 2 (1.5%) 0.12 6 (2.5%) 2 (1.5%) 0.72
  1. Categorical variables were presented as frequencies and percentages; continuous variables were presented as means and standard deviations. CABG  coronary artery bypass grafting.