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Table 1 Baseline characteristics of patients referred for coronary artery bypass grafting

From: Perioperative outcomes of coronary artery bypass graft surgery in Johannesburg, South Africa

  All Patients (n = 1218) Mortality  
   No (n = 1081) Yes (n = 137) p- value
Age, years (SD) 60.1 ± 10.1 59.6 ± 10.1 63.7 ± 9.7 0.000
Male, n (%) 951 (78.1) 844 (78.1) 107 (78.1) 0.994
Ethnicity, n (%)     0.344
 White 634 (52.0) 569 (52.6) 65 (47.4)  
 Indian 358 (29.4) 319 (29.5) 39 (28.5)  
 Black 137 (11.2) 117 (10.8) 20 (14.6)  
 Mixed ancestry 79 (6.5) 66 (6.1) 13 (9.5)  
Medical history, n (%)
 Hypertension 908 (74.5) 813 (75.2) 95 (69.3) 0.138
 Diabetes mellitus 400 (32.8) 345 (31.9) 55 (40.1) 0.053
 Dyslipidaemia 865 (71.0) 791 (73.2) 74 (54.0) 0.000
 Stroke 32 (2.6) 27 (2.5) 5 (3.6) 0.427
 PVD 50 (4.1) 42 (3.9) 8 (5.8) 0.277
 COPD 159 (13.0) 138 (12.8) 21 (15.3) 0.402
Smoking 629 (51.6) 576 (53.3) 53 (38.7) 0.001
NYHA class, n (%)     0.000
 I 523 (48.1) 491 (50.7) 32 (26.9)  
 II 396 (36.4) 344 (35.5) 52 (43.7)  
 III 141 (13.0) 118 (12.2) 23 (19.3)  
 IV 27 (2.5) 15 (1.5) 12 (10.1)  
Laboratory indices
 Haemoglobin, g/dL 14.4 ± 1.7 14.5 ± 1.7 14.2 ± 1.5 0.107
 Sodium, mmol/l 140 ± 3.8 140 ± 3.7 140 ± 4.8 0.107
 eGFR, ml/min 86 (71–99) 87 (73–101) 74 (56–89) 0.000
LVEF, % 50.3 ± 12.8 51.2 ± 12.2 42.9 ± 14.8 0.000
CPB time (min) 139 (115–167) 137 (114–163) 162 (126–211) 0.000
Aortic clamp time (min) 89 (71–107) 89 (70–106) 95 (72–112) 0.107
EuroSCORE II 1.6 (0.9–3.5) 1.5 (0.9–3.1) 5.7 (2.5–10.9) 0.000
  1. Data shown as mean ± standard deviation (SD) and median and interquartile ranges for continuous variables with a normal and skewed distribution, respectively. Categorical variables are summarized as absolute numbers and percentages. COPD Chronic obstructive pulmonary disease; CPB Cardiopulmonary bypass; eGFR Estimated glomerular filtration rate; EuroSCORE European system for cardiac operative risk evaluation; LVEF Left ventricular ejection fraction; NYHA New York Heart Association; PVD Peripheral vascular disease