Table 3 Pre- and intraoperative characteristics of patients in matched analysis
Characteristic Matched Analysis A Matched Analysis B
Redo-OPCAB (n = 111) Redo-CABG (n = 111) P-value SMD* Redo-OPCAB (n = 88) Redo-CABG (n = 88) P-value SMD*
Age (years) 67.8 (8.6) 67.9 (7.2) 0.53 0.01 67.3 (7.7) 67.7 (7.5) 0.74 0.05
Female gender (%) 15 (13) 12 (11) 0.54 0.08 11 (13) 9 (11) 0.65 0.07
BMI (kg/m2) 27.4 (3.7) 27.1 (4) 0.49 0.09 27.8 (3.9) 27.4 (4.3) 0.65 0.08
Reduced LVEF <50% 40 (36) 38 (34) 0.78 0.04 29 (34) 30 (36) 0.86 0.03
Diabetes (%) 26 (23) 29 (26) 0.63 0.06 19 (23) 23 (27) 0.44 0.11
Hypertension (%) 83 (75) 81 (73) 0.76 0.04 60 (71) 62 (74) 0.70 0.05
CKD (%) 1 (1) 1 (1) 1.00 <0.01 0 (0) 1 (1) NA 0.16
Preop creatinine (µmol/l) 100.1 (25.4) 102 (29) 0.76 0.07 96.7 (20) 98.6 (24) 0.82 0.08
eGFR (ml/min/1.73 m2) 66 (16) 65.8 (18) 0.84 0.01 67.9 (16) 67.7 (17.7) 0.83 0.01
Previous CVA (%) 15 (13) 14 (13) 0.84 0.03 9 (11) 9 (11) 1.00 <0.01
PVD (%) 23 (21) 25 (22) 0.73 0.04 13 (15) 15 (18) 0.66 0.06
COPD (%) 20 (18) 17 (15) 0.59 0.07 10 (12) 8 (9) 0.59 0.08
Smoking history (%) 82 (73) 81 (73) 0.88 0.02 65 (78) 60 (71) 0.35 0.14
EuroSCORE 7 (2.7) 6.9 (2.7) 0.83 0.05 7.1 (2.5) 7.2 (2.8) 0.71 0.06
NYHA Class 3/4 (%) 43 (39) 44 (40) 0.89 0.02 35 (42) 33 (39) 0.76 0.05
CCS Class 3/4 (%) 67 (60) 73 (66) 0.43 0.11 57 (68) 55 (65) 0.73 0.05
Urgent surgery (%) 44 (40) 48 (44) 0.57 0.07 33 (39) 28 (33) 0.41 0.12
Previous type of surgery (%) 0.91 0.06
 CABG 84 (76) 83 (75) NA NA
 Valve 16 (14) 18 (16) NA NA
 CABG + valve ± other 11 (10) 10 (9) NA NA
Number of diseased vessels 2.4 (0.7) 2.4 (0.7) 0.79 0.03 2.3 (0.8) 2.4 (0.7) 0.29 0.13
Use of nitrates (%) 18 (16) 17 (15) 0.84 0.03 11 (13) 10 (12) 0.78 0.04
No of grafts 2.1 (0.8) 2.4 (0.8) <0.01 2 (0.8) 2.2 (0.8) 0.03
Use of IMA (%) 62 (56) 52 (47) 0.21 44 (51) 29 (34) 0.02
Use of radial artery (%) 24 (22) 19 (17) 0.39 20 (24) 16 (19) 0.47
Data are reported as mean and SD for continuous variables and as total count and percentages for categorical variable.
SMD: standardized mean difference (reported for the variables included in the propensity score matching process); BMI: body mass index; LVEF: Left ventricular ejection fraction; CKD: chronic kidney disease; CVA: cerebrovascular accident; PVD: peripheral vascular disease; COPD: chronic obstructive pulmonary disease; NYHA: New York Heart Association; CCS: Canadian Cardiovascular Society.
a SMD (reported for the variables included in the propensity score-matching process).