Table 1 Baseline characteristics of participants
FULL COHORT (N =85 989) | Propensity Score–Matched Cohort (n = 17 714) | |||||
|---|---|---|---|---|---|---|
ANEMIA CATEGORY | NONE OR MILD | MODERATE OR SEVERE | SD (100%) | NONE OR MILD | MODERATE OR SEVERE | SD (100%) |
N | 75163 | 10826 | 8857 | 8857 | ||
AGE (years) | 52.456 ± 16.456 | 58.142 ± 17.295 | 33.7% | 60.41 ± 15.94 | 59.23 ± 16.49 | 7.0% |
sex | 33.2% | 9.0% | ||||
Male | 35907 (47.772%) | 3435 (31.729%) | 2672 (30.17%) | 3061 (34.56%) | ||
Female | 39256 (52.228%) | 7391 (68.271%) | 6185 (69.83%) | 5796 (65.44%) | ||
RACE | 14.3% | 10.0% | ||||
Chinese | 54347 (72.309%) | 7448 (68.797%) | 6267 (70.76%) | 6247 (70.53%) | ||
Indian | 6570 (8.741%) | 976 (9.015%) | 666 (7.52%) | 774 (8.74%) | ||
Malay | 7014 (9.332%) | 1489 (13.754%) | 1002 (11.31%) | 1132 (12.78%) | ||
Others | 7228 (9.617%) | 913 (8.433%) | 922 (10.41%) | 704 (7.95%) | ||
PREOP-EGFR | 69.304-104.537 | 27.641-106.590 | 26.5% | 42.39-98.44 | 28.36-107.44 | 3.0% |
RDW N (%) | 99.4% | 56.0% | ||||
RDW≤15.7 | 69383 (92.310%) | 6013 (55.542%) | 7373 (83.24%) | 5263 (59.42%) | ||
RDW>15.7 | 3765 (5.009%) | 4659 (43.035%) | 1426 (16.10%) | 3569 (40.30%) | ||
NA | 2015 (2.681%) | 154 (1.423%) | 58 (0.65%) | 25 (0.28%) | ||
Preop-transfusion with in 30days n(%) | 41.9% | 3.0% | ||||
0 units | 74439 (99.037%) | 9690 (89.507%) | 8247 (93.11%) | 8208 (92.67%) | ||
1 unit | 410 (0.545%) | 597 (5.515%) | 340 (3.84%) | 339 (3.83%) | ||
2 or more units | 314 (0.418%) | 539 (4.979%) | 270 (3.05%) | 310 (3.50%) | ||
Intraop-transfusion | 68.1% | 2.0% | ||||
0 units | 72917 (97.012%) | 8063 (74.478%) | 7105 (80.22%) | 7170 (80.95%) | ||
1 unit | 2246 (2.988%) | 2763 (25.522%) | 1752 (19.78%) | 1687 (19.05%) | ||
CVA CATEGORY | 13.1% | 2.0% | ||||
NO | 51068 (67.943%) | 7133 (65.888%) | 5819 (65.70%) | 5864 (66.21%) | ||
YES | 1142 (1.519%) | 386 (3.565%) | 302 (3.41%) | 325 (3.67%) | ||
NA | 22953 (30.538%) | 3307 (30.547%) | 2736 (30.89%) | 2668 (30.12%) | ||
CHF CATEGORY | 17.2% | 4.0% | ||||
NO | 53543 (71.236%) | 7415 (68.493%) | 6114 (69.03%) | 6132 (69.23%) | ||
YES | 475 (0.632%) | 308 (2.845%) | 191 (2.16%) | 247 (2.79%) | ||
NA | 21145 (28.132%) | 3103 (28.662%) | 2552 (28.81%) | 2478 (27.98%) | ||
IHD CATEGORY | 22.9% | 4.0% | ||||
NO | 48887 (65.041%) | 6416 (59.265%) | 5248 (59.25%) | 5252 (59.30%) | ||
YES | 3128 (4.162%) | 1068 (9.865%) | 816 (9.21%) | 909 (10.26%) | ||
NA | 23148 (30.797%) | 3342 (30.870%) | 2793 (31.53%) | 2696 (30.44%) | ||
DM CATEGORY | 25.7% | 13.0% | ||||
NO | 52257 (69.525%) | 6909 (63.819%) | 5868 (66.25%) | 5711 (64.48%) | ||
YES | 1262 (1.679%) | 723 (6.678%) | 342 (3.86%) | 607 (6.85%) | ||
NA | 21644 (28.796%) | 3194 (29.503%) | 2647 (29.89%) | 2539 (28.67%) | ||
Anesthesia type n(%) | 17.7% | 5.0% | ||||
ga | 63448 (84.414%) | 8389 (77.489%) | 6805 (76.83%) | 6989 (78.91%) | ||
ra | 11715 (15.586%) | 2437 (22.511%) | 2052 (23.17%) | 1868 (21.09%) | ||
Priority of surgery n(%) | 33.2% | 8.0% | ||||
Elective | 60799 (80.890%) | 7197 (66.479%) | 5809 (65.59%) | 6160 (69.55%) | ||
Emergency | 14364 (19.110%) | 3629 (33.521%) | 3048 (34.41%) | 2697 (30.45%) | ||
Surgical risk | 26.7% | 7.0% | ||||
Low | 39779 (52.924%) | 4531 (41.853%) | 3599 (40.63%) | 3880 (43.81%) | ||
Moderate | 32691 (43.493%) | 5417 (50.037%) | 4612 (52.07%) | 4314 (48.71%) | ||
High | 2693 (3.583%) | 878 (8.110%) | 646 (7.29%) | 663 (7.49%) | ||
RCRI CATEGORY | 52.7% | 18.0% | ||||
I | 41157 (54.757%) | 3769 (34.814%) | 3484 (39.34%) | 3138 (35.43%) | ||
II | 9884 (13.150%) | 2516 (23.240%) | 1766 (19.94%) | 2066 (23.33%) | ||
III | 1559 (2.074%) | 869 (8.027%) | 476 (5.37%) | 728 (8.22%) | ||
IV | 473 (0.629%) | 407 (3.759%) | 224 (2.53%) | 336 (3.79%) | ||
NA | 22090 (29.389%) | 3265 (30.159%) | 2907 (32.82%) | 2589 (29.23%) | ||
ASA CATEGORY | 72.3% | 35.0% | ||||
1 | 18716 (24.901%) | 1109 (10.244%) | 1117 (12.61%) | 816 (9.21%) | ||
2 | 43132 (57.385%) | 4592 (42.416%) | 4447 (50.21%) | 3839 (43.34%) | ||
3 | 9813 (13.056%) | 4453 (41.132%) | 2379 (26.86%) | 3738 (42.20%) | ||
NA | 3502 (4.659%) | 672 (6.207%) | 914 (10.32%) | 464 (5.24%) | ||
Postop- transfusion | 40.7% | 28.0% | ||||
0 units | 75081 (99.891%) | 9966 (92.056%) | 8787 (99.21%) | 8352 (94.30%) | ||
≥1 unit | 82 (0.109%) | 860 (7.944%) | 70 (0.79%) | 505 (5.70%) | ||
ICUADMGT24H | 19.1% | 00.0% | ||||
No | 74366 (98.940%) | 10386 (95.936%) | 8542 (96.44%) | 8542 (96.44%) | ||
Yes | 797 (1.060%) | 440 (4.064%) | 315 (3.56%) | 315 (3.56%) | ||
THIRTY-DAY MORTALITY N(%) | 21.4% | 09.0% | ||||
No | 74955 (99.723%) | 10505 (97.035%) | 8749 (98.78%) | 8638 (97.53%) | ||
Yes | 208 (0.277%) | 321 (2.965%) | 108 (1.22%) | 219 (2.47%) | ||