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Table 1 Selected Cohort Characteristics Before and After Propensity Score-Matching

From: Preoperative malnutrition with mild hypoalbuminemia associated with postoperative mortality and morbidity of colorectal cancer: a propensity score matching study

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)  
  1. 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
  2. a assistance from another person for any activities of daily living