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Table 4 Characteristics of patients with colon cancer stages I-III that underwent major resections with curative intent

From: Octogenarian patients with colon cancer – postoperative morbidity and mortality are the major challenges

Characteristic Total,
n = 1021
Age group (years) P value
 < 65,
n = 233
65–74,
n = 327
75–79,
n = 201
80–84,
n = 171
85–89,
n = 66
 ≥ 90,
n = 23
Sex         0.043a
  Females 534 (52) 121 (52) 156 (48) 105 (52) 99 (58) 38 (58) 15 (65)  
  Males 487 (48) 112 (48) 171 (52) 96 (48) 72 (42) 28 (42) 8 (35)  
Calendar year         0.011b
  1980–1989 175 (17) 50 (29) 61 (35) 28 (16) 27 (15) 9 (5) 0 (0)  
  1990–1999 241 (24) 55 (23) 79 (33) 49 (20) 35 (15) 16 (7) 7 (3)  
  2000–2009 334 (33) 82 (25) 92 (28) 64 (19) 67 (20) 18 (5) 11 (3)  
  2010–2016 271 (27) 46 (17) 95 (35) 60 (22) 42 (16) 23 (9) 5 (2)  
ASA score          < 0.001b
  1–2 591 (58) 190 (82) 215 (66) 94 (47) 69 (40) 19 (29) 4 (17)  
  3 395 (39) 41 (18) 101 (31) 101 (50) 93 (54) 44 (67) 15 (65)  
  4 35 (3) 2 (1) 11 (3) 6 (3) 9 (5) 3 (5) 4 (17)  
Localization          < 0.001a
  Right colon  573 (56) 103 (44) 179 (55) 130 (65) 105 (61) 43 (65) 13 (57)  
  Left colon 448 (44) 130 (56) 148 (45) 71 (35) 66 (39) 23 (35) 10 (43)  
Stage (TNM)         0.050b
  I 154 (15) 33 (14) 54 (17) 25 (12) 27 (16) 12 (18) 3 (13)  
  II 548 (54) 125 (54) 157 (48) 116 (58) 91 (53) 43 (65) 16 (70)  
  III 319 (31) 75 (32) 116 (35) 60 (30) 53 (31) 11 (17) 4 (17)  
R-status         0.44c
  R0—resection 983 (96.3) 223 (96) 317 (97) 196 (98) 160 (94) 64 (97) 23 (100)  
  R0—resection with perforation 20 (2) 7 (3) 5 (2) 3 (2) 4 (2) 1 (2) 0 (0)  
  R1—resection 18 (2) 2 (1) 4 (1) 2 (1) 7 (4) 1 (2) 0 (0)  
Type of resection         0.003c
  Right hemicolectomy 504 (49) 87 (37) 156 (48) 113 (56) 99 (58) 37 (56) 12 (52)  
  Transverse resection 24 (2) 5 (2) 9 (3) 4 (2) 2 (1) 4 (6) 0 (0)  
  Left hemicolectomy 131 (13) 39 (17) 44 (14) 27 (13) 12 (7) 4 (6) 5 (22)  
  Sigmoid and high anterior resections 267 (26) 75 (32) 89 (27) 41 (20) 43 (25) 16 (24) 3 (13)  
  Hartmann's operation 35 (3) 10 (4) 12 (4) 5 (2) 3 (2) 3 (4) 3 (13)  
  Subtotal resection 55 (5) 15 (6) 17 (5) 10 (5) 11 (6) 2 (3) 0 (0)  
  Other resections 5 (1) 2 (1) 0 (0) 1 (1) 1 (1) 1 (2) 0 (0)  
Emergency surgery         0.13a
  Yes 141 (14) 30 (13) 47 (14) 20 (10) 27 (16) 7 (11) 10 (43)  
  No 880 (86) 203 (87) 280 (86) 181 (90) 144 (84) 59 (89) 13 (57)  
  1. Values are the number of patients (%), unless otherwise indicated. aCochran-Armitage exact trend test; bOrdinal logistic regression with age group as covariate; cNominal logistic regression with age group as covariate