Table 1.
Selected Cohort Characteristics Before and After Propensity Score-Matching
| Variables | Full Cohort | Matched Cohort (1:2) | ||||
|---|---|---|---|---|---|---|
| Albumin (g/dl) | P value | Albumin (g/dl) | P value | |||
| < 3.5 and > =3.0 (n = 5230) | > = 3.5 (n = 21,310) | < 3.5 and > =3.0 (n = 4305) | > = 3.5 (n = 8610) | |||
| Age, mean (SD), y | 70.2(13.7) | 65.2(13.6) | < 0.001 | 68.9(13.8) | 69.3(13.1) | 0.075 |
| BMI, mean (SD) | 27.6(7.2) | 28.2(6.5) | < 0.001 | 28(7.2) | 27.9(6.3) | 0.441 |
| Gender, male, n(%) | 2527(48.3) | 11,370(53.4) | < 0.001 | 2140 (49.7) | 4290(49.8) | 0.901 |
| Smoking, n(%) | 834(15.9) | 3125(14.7) | 0.02 | 677(15.7) | 1327(15.4) | 0.643 |
| Ventilator, n(%) | 6(0.1) | 12(0.05) | 0.146 | 4(0.09) | 3(0.03) | 0.181 |
| COPD, n(%) | 469(9) | 1061(5) | < 0.001 | 325(7.5) | 607(7) | 0.301 |
| Ascites, n(%) | 108(2.1) | 128(0.6) | < 0.001 | 43(1) | 60(0.7) | 0.069 |
| CHF, n(%) | 137(2.6) | 161(0.8) | < 0.001 | 42(1) | 74(0.9) | 0.51 |
| Hypertension, n(%) | 3104(59.3) | 11,492(53.9) | < 0.001 | 2517(58.5) | 5072(58.9) | 0.631 |
| Renal failure, n(%) | 13(0.2) | 27(0.1) | 0.042 | 4(0.1) | 15(0.2) | 0.256 |
| Dialysis, n(%) | 47(0.9) | 80(0.4) | < 0.001 | 21(0.5) | 48(0.6) | 0.609 |
| DC, n(%) | 770(14.7) | 1977(9.3) | < 0.001 | 539(12.5) | 1048(12.2) | 0.57 |
| Steroid, n(%) | 185(3.5) | 541(2.5) | < 0.001 | 140(3.3) | 259(3) | 0.45 |
| Emergency, n(%) | 503(9.6) | 834(3.9) | < 0.001 | 242(5.6) | 429(5) | 0.123 |
| BWL, n(%) | 606(11.6) | 1007(4.7) | < 0.001 | 315(7.3) | 574(6.7) | 0.169 |
| Diabetes mellitus, n(%) | < 0.001 | 0.679 | ||||
| No | 4083(78.1) | 17,604(82.6) | 3415(79.3) | 6816(79.1) | ||
| Oral | 723(13.8) | 2702(12.7) | 607(14.1) | 1194(13.9) | ||
| Insulin | 424(8.1) | 1004(4.7) | 283(6.6) | 600(7) | ||
| Dyspnea | < 0.001 | 0.590 | ||||
| No | 4443(85) | 19,340(90.8) | 3753(87.2) | 7546(87.7) | ||
| Exertion | 696(13.3) | 1858(8.7) | 515(12) | 1002(11.6) | ||
| Rest | 91(1.7) | 112(0.5) | 37(0.8) | 62(0.7) | ||
| Systemic sepsis | < 0.001 | 0.156 | ||||
| No | 4798(91.7) | 20,775(97.5) | 4148(96.4) | 8355(97) | ||
| SIRS | 303(5.8) | 386(1.8) | 114(2.6) | 188(2.2) | ||
| Sepsis | 118(2.3) | 128(0.6) | 39(0.9) | 57(0.7) | ||
| Septic shock | 11(0.2) | 21(0.1) | 4(0.1) | 10(0.1) | ||
| Functional statusa, n(%) | < 0.001 | 0.883 | ||||
| Independent | 4781(91.4) | 20,749(97.4) | 4154(96.5) | 8322(96.6) | ||
| Partially Dependent | 381(7.3) | 504(2.4) | 140(3.2) | 266(3.1) | ||
| Totally Dependent | 68(1.3) | 57(0.3) | 11(0.3) | 22(0.3) | ||
| ASA | < 0.001 | 0.169 | ||||
| I | 42(0.8) | 519(2.4) | 42(1) | 95(1.1) | ||
| II | 1256(24) | 8779(41.2) | 1213(28.2) | 2273(26.4) | ||
| III | 3307(63.2) | 11,009(51.7) | 2753(63.9) | 5634(65.44) | ||
| IV | 620(11.9) | 996(4.67) | 295(6.85) | 607(7.05) | ||
| V | 5(0.1) | 7(0.03) | 2(0.05) | 1(0.01) | ||
| Wound | < 0.001 | 0.343 | ||||
| II | 4526(86.5) | 19,604(92) | 3885(90.24) | 7805(90.6) | ||
| III | 375(7.2) | 1252(5.9) | 285(6.62) | 574(6.7) | ||
| IV | 329(6.3) | 454(2.1) | 135(3.14) | 231(2.7) | ||
BMI body mass index, COPD chronic obstructive pulmonary disease, CHF Congestive heart failure, DC Disseminated cancer, BWL body weight loss, ASA American Society of Anesthesiologists, Wound II clean/contamination, Wound III contamination, Wound IV dirty
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