PLT (quartile) | Q1 (15.00–193.00) | Q2 (194.00–235.00) | Q3 (236.00–284.00) | Q4 (285.00–988.00) | P value |
---|---|---|---|---|---|
N (cases) | 4482 | 4508 | 4521 | 4552 | Â |
BMI, (Mean ± SD) | 28.443 ± 6.144 | 28.825 ± 6.592 | 28.815 ± 7.034 | 28.751 ± 7.146 | 0.026 |
Na, (Mean ± SD) | 138.848 ± 3.307 | 138.779 ± 3.096 | 138.690 ± 3.060 | 138.191 ± 3.237 | < 0.001 |
Cr, (Mean ± SD) | 0.918 ± 0.512 | 0.872 ± 0.465 | 0.840 ± 0.336 | 0.818 ± 0.439 | < 0.001 |
WBC, median (quartile) | 7.320 (5.600–10.100) | 8.000 (6.200–10.900) | 8.600 (6.700–11.700) | 10.000 (7.600–13.500) | < 0.001 |
HCT, (Mean ± SD) | 39.946 ± 5.203 | 40.765 ± 4.568 | 40.772 ± 4.499 | 39.773 ± 4.828 | < 0.001 |
BUN, median (quartile) | 16.527 (13.000–22.000) | 16.000 (13.000–20.000) | 16.000 (12.000–19.048) | 16.000 (12.000–20.000) | < 0.001 |
Operation time, median (quartile) | 179.000 (120.250–259.000) | 183.000 (123.000–270.000 | 184.000 (122.000–273.000 | 178.000 (117.000–266.000) | 0.014 |
Sex N (%) |  |  |  |  | < 0.001 |
 Male | 2710 (60.464%) | 2337 (51.841%) | 1999 (44.216%) | 1532 (33.656%) |  |
 Female | 1772 (39.536%) | 2171 (48.159%) | 2522 (55.784%) | 3020 (66.344%) |  |
Race N (%) | Â | Â | Â | Â | 0.002 |
 White | 3264 (72.825%) | 3219 (71.406%) | 3215 (71.113%) | 3124 (68.629%) |  |
 Asian | 120 (2.677%) | 137 (3.039%) | 120 (2.654%) | 149 (3.273%) |  |
 African American | 275 (6.136%) | 292 (6.477%) | 291 (6.437%) | 357 (7.843%) |  |
 Unknown race | 823 (18.362%) | 860 (19.077%) | 895 (19.797%) | 922 (20.255%) |  |
Age ranges N (%) |  |  |  |  | < 0.001 |
 18–40 | 586 (13.075%) | 749 (16.615%) | 806 (17.828%) | 780 (17.135%) |  |
 41–60 | 1622 (36.189%) | 1841 (40.839%) | 1938 (42.867%) | 2098 (46.090%) |  |
 61–80 | 2034 (45.382%) | 1790 (39.707%) | 1639 (36.253%) | 1583 (34.776%) |  |
 >81 | 240 (5.355%) | 128 (2.839%) | 138 (3.052%) | 91 (1.999%) |  |
Diabetes N (%) |  |  |  |  | < 0.001 |
 No | 3867 (86.278%) | 4000 (88.731%) | 4032 (89.184%) | 4039 (88.730%) |  |
 Yes (Noninsulin) | 368 (8.211%) | 337 (7.476%) | 300 (6.636%) | 336 (7.381%) |  |
 Yes (Insulin) | 247 (5.511%) | 171 (3.793%) | 189 (4.180%) | 177 (3.888%) |  |
Smoking status N (%) |  |  |  |  | < 0.001 |
 No | 3783 (84.404%) | 3687 (81.788%) | 3590 (79.407%) | 3502 (76.933%) |  |
 Yes | 699 (15.596%) | 821 (18.212%) | 931 (20.593%) | 1050 (23.067%) |  |
Severe COPD N (%) |  |  |  |  | < 0.001 |
 No | 4302 (95.984%) | 4329 (96.029%) | 4324 (95.643%) | 4287 (94.178%) |  |
 Yes | 180 (4.016%) | 179 (3.971%) | 197 (4.357%) | 265 (5.822%) |  |
Hypertension N (%) |  |  |  |  | < 0.001 |
 No | 2605 (58.121%) | 2810 (62.334%) | 2872 (63.526%) | 2871 (63.071%) |  |
 Yes | 1877 (41.879%) | 1698 (37.666%) | 1649 (36.474%) | 1681 (36.929%) |  |
Dialysis |  |  |  |  | < 0.001 |
 No | 4455 (99.398%) | 4500 (99.823%) | 4512 (99.801%) | 4540 (99.736%) |  |
 Yes | 27 (0.602%) | 8 (0.177%) | 9 (0.199%) | 12 (0.264%) |  |
Steroid use for chronic condition N (%) |  |  |  |  | < 0.001 |
 No | 3601 (80.344%) | 3911 (86.757%) | 3917 (86.640%) | 3896 (85.589%) |  |
 Yes | 881 (19.656%) | 597 (13.243%) | 604 (13.360%) | 656 (14.411%) |  |
Bleeding disorders N (%) |  |  |  |  | < 0.001 |
 No | 4283 (95.560%) | 4448 (98.669%) | 4459 (98.629%) | 4500 (98.858%) |  |
 Yes | 199 (4.440%) | 60 (1.331%) | 62 (1.371%) | 52 (1.142%) |  |
Preoperation transfusions N (%) | Â | Â | Â | Â | 0.003 |
 No | 4457 (99.442%) | 4500 (99.823%) | 4512 (99.801%) | 4531 (99.539%) |  |
 Yes | 25 (0.558%) | 8 (0.177%) | 9 (0.199%) | 21 (0.461%) |  |
Preoperation systemic sepsis N (%) |  |  |  |  | < 0.001 |
 No | 4321 (96.408%) | 4357 (96.650%) | 4392 (97.147%) | 4323 (94.969%) |  |
 SIRS | 160 (3.570%) | 147 (3.261%) | 127 (2.809%) | 225 (4.943%) |  |
 Septic Shock | 1 (0.022%) | 4 (0.089%) | 2 (0.044%) | 4 (0.088%) |  |
Emergency case N (%) | Â | Â | Â | Â | 0.578 |
 No | 4194 (93.574%) | 4215 (93.500%) | 4232 (93.608%) | 4232 (92.970%) |  |
 Yes | 288 (6.426%) | 293 (6.500%) | 289 (6.392%) | 320 (7.030%) |  |
30 day mortality events, N (%) |  |  |  |  | < 0.001 |
 No | 4313 (96.229%) | 4415 (97.937%) | 4444 (98.297%) | 4439 (97.518%) |  |
 Yes | 169 (3.771%) | 93 (2.063%) | 77 (1.703%) | 113 (2.482%) |  |