Patient characteristics in univariate analysis | Bias in multivariable logistic regression | Patient characteristics after propensity score matching | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Total N = 747 | Urgent N = 84 | Elective N = 663 | p | OR (95 % CI) | p c | Urgent N = 83 | Elective N = 621 | p | ||
Age | years | 71.4 ± 12.1 | 72.0 ± 11.2 | 71.3 ± 12.2 | 0.884a | 1.01 (0.99–1.03) | 0.490 | 72.1 ± 11.3 | 72.5 ± 11.7 | 0.760a |
Sex | m | 421 (56.4 %) | 43 (51.2 %) | 378(57.0 %) | 0.311b | Reference | 0.517 | 42 (50.6 %) | 333.5 (53.7 %) | 0.594b |
w | 326 (43.6 %) | 41 (48.8 %) | 285 (43.0 %) | 1.19 (0.71–1.99) | 41 (49.4 %) | 287.5 (46.3 %) | ||||
Tumor localisation | Cecum | 132 (17.7 %) | 12 (14.3 %) | 120 (18.1 %) | 0.019b | Reference | 0.092 | 12 (14.5 %) | 95.4 (15.4 %) | 0.927b |
Ascending colon | 130 (17.4 %) | 12 (14.3 %) | 118 (17.8 %) | 1.25 (0.50–3.19) | 12 (14.5 %) | 82.4 (13.3 %) | ||||
Transverse colon | 40 (5.4 %) | 7 (8.3 %) | 33 (5.0 %) | 2.50 (0.80–7.43) | 7 (8.4 %) | 55.7 (9.0 %) | ||||
Descending colon | 81 (10.8 %) | 12 (14.3 %) | 69 (10.4 %) | 2.29 (0.88–6.01) | 12 (14.5 %) | 80.9 (13.0 %) | ||||
Sigmoid colon | 201 (26.9 %) | 32 (38.1 %) | 169 (25.5 %) | 1.95 (0.90–4.44) | 31 (37.3 %) | 258.1 (41.6 %) | ||||
Rectum | 163 (21.8 %) | 9 (10.7 %) | 154 (23.2 %) | 0.78 (0.28–2.12) | 9 (10.8 %) | 48.7 (7.8 %) | ||||
Perforation | No | 674 (90.2 %) | 56 (66.7 %) | 618 (93.2 %) | <0.001b | Reference | <0.001 | 56 (67.5 %) | 465.5 (75.0 %) | 0.144b |
Yes | 73 (9.8 %) | 28 (33.3 %) | 45 (6.8 %) | 7.17 (3.93–13.09) | 27 (32.5 %) | 155.5 (25.0 %) | ||||
Protective colostomy | No | 657 (88.0 %) | 71 (84.5 %) | 586 (88.4 %) | 0.306b | Reference | 0.129 | 70 (84.3 %) | 512.7 (82.6 %) | 0.687b |
Yes | 90 (12.0 %) | 13 (15.5 %) | 77 (11.6 %) | 1.82 (0.83–3.80) | 13 (15.7 %) | 108.3 (17.4 %) | ||||
Resection status | R0 | 718 (96.1 %) | 76 (90.5 %) | 642 (96.8 %) | 0.014c | Reference | 0.114 | 76 (91.6 %) | 571.8 (92.1 %) | 0.870b |
R1/2 | 29 (3.9 %) | 8 (9.5 %) | 21 (3.2 %) | 2.32 (0.81–6.09) | 7 (8.4 %) | 49.2 (7.9 %) | ||||
UICC Stage | I | 166 (22.2 %) | 13 (15.5 %) | 153 (23.1 %) | 0.332b | Reference | 0.599 | 13 (15.7 %) | 69.9 (11.3 %) | 0.698b |
II | 212 (28.4 %) | 23 (27.4 %) | 189 (28.5 %) | 1.41 (0.63–3.29) | 23 (27.7 %) | 172.4 (27.8 %) | ||||
III | 220 (29.5 %) | 27 (32.1 %) | 193 (29.1 %) | 1.30 (0.55–3.15) | 26 (31.3 %) | 209.8 (33.8 %) | ||||
IV | 149 (19.9 %) | 21 (25.0 %) | 128 (19.3 %) | 1.83 (0.72–4.71) | 21 (25.3 %) | 168.9 (27.2 %) | ||||
Tumor diameter | mm | 45.8 ± 21.6 | 45.7 ± 20.6 | 45.8 ± 21.7 | 0.831a | 0.99 (0.98–1.00) | 0.107 | 45.6 ± 20.7 | 43.7 ± 19.3 | 0.421a |
Lymph node yield | <12 | 166 (22.2 %) | 10 (11.9 %) | 156 (23.5 %) | 0.016b | Reference | 0.040 | 10 (12.0 %) | 46.1 (7.4 %) | 0.143b |
12+ | 581 (77.8 %) | 74 (88.1 %) | 507 (76.5 %) | 2.08 (1.03–4.58) | 73 (88.0 %) | 574.9 (92.6 %) | ||||
Tumor grading | G1 | 23 (3.1 %) | 3 (3.6 %) | 20 (3.0 %) | 0.180b | Reference | 0.196 | 3 (3.6 %) | 29.2 (4.7 %) | 0.823b |
G2 | 540 (72.3 %) | 53 (63.1 %) | 487 (73.5 %) | 0.45 (0.14–2.03) | 52 (62.7 %) | 355.9 (57.3 %) | ||||
G3 | 148 (19.8 %) | 21 (25.0 %) | 127 (19.2 %) | 0.62 (0.17–2.99) | 21 (25.3 %) | 175.1 (28.2 %) | ||||
GX | 36 (4.8 %) | 7 (8.3 %) | 29 (4.4 %) | 1.21 (0.26–6.73) | 7 (8.4 %) | 60.7 (9.8 %) | ||||
Adjuvant Chemotherapy | No | 505 (67.6 %) | 51 (60.7 %) | 454 (68.5 %) | 0.152b | Reference | 0.785 | 51 (61.4 %) | 382.8 (61.6 %) | 0.973b |
Yes | 242 (32.4 %) | 33 (39.3 %) | 209 (31.5 %) | 1.09 (0.59–2.01) | 32 (38.6 %) | 238.2 (38.4 %) |