Table 1 Baseline statistics and early postoperative complications of the two groups of CABG operated patients before and after matching
Propensity score-matched cohort | |||||
|---|---|---|---|---|---|
Conventional | No-touch | Conventional | No-touch | Standardized differences | |
Study population | 26,437 | 1371 | 1349 | 1349 | |
Year of surgery: | |||||
2005–2006 | 6240 (23.6%) | 381 (27.8%) | 345 (25.6%) | 381 (28.2%) | 0.06 |
2007–2008 | 5856 (22.2%) | 283 (20.6%) | 303 (22.5%) | 283 (21.0%) | 0.04 |
2009–2010 | 4780 (18.1%) | 231 (16.8%) | 232 (17.2%) | 226 (16.8%) | 0.01 |
2011–2012 | 4149 (15.7%) | 181 (13.2%) | 164 (12.2%) | 174 (12.9%) | 0.02 |
2013–2015 | 5412 (20.5%) | 295 (21.5%) | 305 (22.6%) | 285 (21.1%) | 0.04 |
Age (years): | |||||
40–50 | 1042 (3.9%) | 47 (3.4%) | 35 (2.6%) | 46 (3.4%) | 0.05 |
50–60 | 4715 (17.8%) | 251 (18.3%) | 234 (17.3%) | 244 (18.1%) | 0.02 |
60–65 | 4734 (17.9%) | 256 (18.7%) | 255 (18.9%) | 254 (18.8%) | 0.00 |
65–70 | 5659 (21.4%) | 313 (22.8%) | 310 (23.0%) | 307 (22.8%) | 0.01 |
70–75 | 5740 (21.7%) | 316 (23.0%) | 305 (22.6%) | 311 (23.1%) | 0.01 |
75–80 | 4547 (17.2%) | 188 (13.7%) | 210 (15.6%) | 187 (13.9%) | 0.05 |
Female | 4853 (18.4%) | 207 (15.1%) | 197 (14.6%) | 201 (14.9%) | 0.01 |
BMI: | |||||
< 25 | 6903 (28.4%) | 373 (27.2%) | 387 (28.7%) | 365 (27.1%) | 0.04 |
25–30 | 11,631 (47.8%) | 674 (49.2%) | 664 (49.2%) | 668 (49.5%) | 0.01 |
> 30 | 5785 (23.8%) | 323 (23.6%) | 298 (22.1%) | 316 (23.4%) | 0.03 |
BMI not recorded | 2118 (8.0%) | 1 (0.1%) | |||
Diabetes | 6757 (26.1%) | 329 (24.0%) | 315 (23.4%) | 321 (23.8%) | 0.01 |
Presence of diabetes not recorded | 584 (2.2%) | 1 (0.1%) | |||
Renal impairment: | |||||
Normal, (CC > 85 ml/min) | 12,149 (50.1%) | 742 (54.2%) | 691 (51.2%) | 729 (54.0%) | 0.06 |
Moderately impaired (50–85 ml/min) | 10,248 (42.3%) | 552 (40.3%) | 585 (43.4%) | 546 (40.5%) | 0.06 |
Severely impaired (< 50 ml/min) off dialysis | 1596 (6.6%) | 69 (5.0%) | 71 (5.3%) | 68 (5.0%) | 0.01 |
On dialysis | 253 (1.0%) | 6 (0.4%) | 2 (0.2%) | 6 (0.4%) | 0.05 |
Renal impairment not recorded | 2191 (8.3%) | 2 (0.2%) | |||
COPD | 1872 (7.3%) | 58 (4.3%) | 56 (4.2%) | 58 (4.3%) | 0.01 |
COPD not recorded | 961 (3.6%) | 12 (0.9%) | |||
Extracardiac arteriopathy | 2166 (8.3%) | 88 (6.4%) | 82 (6.1%) | 88 (6.5%) | 0.02 |
Extracardiac arteriopathy not recorded | 305 (1.2%) | 5 (0.4%) | |||
Neurological disability | 554 (2.2%) | 45 (3.3%) | 44 (3.3%) | 45 (3.3%) | 0.00 |
Neurological disability not recorded | 971 (3.7%) | 1 (0.1%) | |||
Ejection fraction: | |||||
Normal | 18,161 (69.5%) | 1055 (77.1%) | 1065 (78.9%) | 1046 (77.5%) | 0.03 |
30–50% | 6682 (25.6%) | 259 (18.9%) | 242 (17.9%) | 251 (18.6%) | 0.02 |
< 30% | 1289 (4.9%) | 54 (3.9%) | 42 (3.1%) | 52 (3.9%) | 0.04 |
Ejection fraction not recorded | 305 (1.2%) | 3 (0.2%) | |||
MI last 90 days | 10,853 (41.5%) | 500 (36.5%) | 492 (36.5%) | 487 (36.1%) | 0.01 |
Prior MI not recorded | 304 (1.1%) | 0 (0.0%) | |||
Previous PCI | 3537 (16.1%) | 269 (19.7%) | 254 (18.8%) | 263 (19.5%) | 0.02 |
Previous PCI not recorded | 4492 (17.0%) | 5 (0.4%) | |||
Emergency surgery | 1124 (4.3%) | 53 (3.9%) | 47 (3.5%) | 49 (3.6%) | 0.01 |
Urgency not recorded | 62 (0.2%) | 0 (0.0%) | |||
Number of distal anastomoses: | |||||
2 | 5565 (21.1%) | 187 (13.6%) | 202 (15.0%) | 183 (13.6%) | 0.04 |
3 | 11,605 (43.9%) | 458 (33.4%) | 467 (34.6%) | 451 (33.4%) | 0.03 |
4 | 7019 (26.5%) | 532 (38.8%) | 469 (34.8%) | 521 (38.6%) | 0.08 |
5+ | 2248 (8.5%) | 194 (14.2%) | 211 (15.6%) | 194 (14.4%) | 0.04 |
Off-pump | 130 (0.5%) | 81 (5.9%) | 81 (6.0%) | 81 (6.0%) | 0.00 |