Table 1.
Factors |
Before PSM
|
After PSM
|
||||||
Non-IFD (n = 976)
|
IFD (n = 97)
|
χ²
|
P value
|
Non-IFD (n = 194)
|
IFD (n = 97)
|
χ² |
P value
|
|
Gender | 6.831 | 0.009 | 0.000 | 1.000 | ||||
Female | 426 (43.6) | 29 (29.9) | 58 (29.9) | 29 (29.9) | ||||
Male | 550 (56.4) | 68 (70.1) | 136 (70.1) | 68 (70.1) | ||||
Tumor locations | 8.131 | 0.043 | 0.000 | 1.000 | ||||
Asending colon | 402 (41.2) | 51 (52.6) | 102 (52.6) | 51 (52.6) | ||||
Transverse colon | 63 (6.5) | 7 (7.2) | 14 (7.2) | 7 (7.2) | ||||
Descending colon | 395 (40.5) | 25 (25.8) | 50 (25.8) | 25 (25.8) | ||||
Sigmoid colon | 116 (11.8) | 14 (14.4) | 28 (14.4) | 14 (14.4) | ||||
Age (yr) | 2.060 | 0.151 | 0.063 | 0.801 | ||||
< 65 | 499 (51.1) | 57 (58.7) | 111 (57.2) | 57 (58.7) | ||||
≥ 65 | 477 (48.9) | 40 (41.3) | 83 (42.8) | 40 (41.3) | ||||
ASA grade | 1.336 | 0.248 | 0.248 | 0.619 | ||||
I-II | 888 (84.2) | 86 (88.7) | 168 (86.6) | 86 (88.7) | ||||
III-IV | 154 (15.8) | 11 (11.3) | 26 (13.4) | 11 (11.3) | ||||
CEA | 1.212 | 0.271 | 1.457 | 0.227 | ||||
< 5 ng/mL | 715 (73.3) | 66 (68.1) | 145 (77.7) | 66 (68.1) | ||||
≥ 5 ng/mL | 261 (26.7) | 31 (31.9) | 49 (22.3) | 31 (31.9) | ||||
CA19-9 | 0.039 | 0.844 | 1.155 | 0.282 | ||||
< 34 U/mL | 852 (87.3) | 84 (86.6) | 176 (90.8) | 84 (86.6) | ||||
≥ 34 U/mL | 124 (22.7) | 13 (13.5) | 18 (9.2) | 13 (13.5) | ||||
Hypertension (yes) | 316 (32.4) | 33 (34.0) | 1.109 | 0.742 | 63 (32.5) | 33 (34.0) | 0.070 | 0.791 |
DM (yes) | 198 (19.9) | 18 (18.6) | 0.098 | 0.755 | 26 (13.4) | 18 (18.6) | 1.339 | 0.247 |
CHD (yes) | 98 (10.0) | 10 (10.3) | 0.007 | 0.933 | 10 (5.2) | 10 (10.3) | 2.685 | 0.101 |
Antiplatelet (yes) | 89 (9.1) | 9 (9.3) | 0.003 | 0.956 | 10 (5.2) | 9 (9.3) | 1.802 | 0.179 |
Abdominal surgery (yes) | 99 (10.1) | 12 (12.4) | 0.477 | 0.490 | 33 (17.1) | 12 (12.4) | 1.065 | 0.302 |
PSM: Propensity score matching; IFD: Intestinal flora disorder; ASA: American society of anesthesiologist; CEA: Carcino embryonic antigen; CA19-9: Carbohydrate antigen 19-9; DM: Diabetes mellitus; CHD: Coronary heart diseases.