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Table 1 Characteristics of all patients admitted with colon cancer during the 1980–2016 study period

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

Characteristic Total,
n = 1530
Age group (years) P value
 < 65,
n = 353
65–74,
n = 451
75–79,
n = 281
80–84,
n = 269
85–89,
n = 124
 ≥ 90,
n = 52
Sex         0.031a
  Females 780 (51) 181 (23) 210 (27) 139 (18) 148 (19) 70 (9) 32 (4)  
  Males 750 (49) 172 (23) 241 (32) 142 (19) 121 (16) 54 (7) 20 (3)  
Calendar year          < 0.001b
  1980–1989 274 (18) 70 (26) 89 (33) 45 (16) 49 (18) 18 (7) 3 (1)  
  1990–1999 367 (24) 85 (23) 115 (31) 73 (20) 56 (15) 29 (8) 9 (3)  
  2000–2009 487 (32) 129 (27) 121 (25) 85 (18) 100 (21) 33 (7) 19 (4)  
  2010–2016 402 (26) 69 (17) 126 (31) 78 (19) 65 (16) 44 (11) 21 (5)  
Charlson Comorbidity Index          < 0.001b
  0 1076 (70) 300 (85) 321 (71) 187 (66) 165 (61) 75 (61) 28 (54)  
  1–2 358 (23) 51 (14) 100 (22) 72 (26) 81 (30) 39 (32) 15 (29)  
   > 2 96 (6) 2 (1) 30 (7) 22 (8) 23 (9) 10 (8) 9 (17)  
ASA score          < 0.001b
  1–2 832 (54) 282 (80) 284 (63) 134 (48) 94 (35) 28 (23) 10 (19)  
  3 598 (39) 66 (19) 147 (33) 131 (47) 150 (56) 76 (61) 28 (54)  
  4–5 100 (7 5 (1) 20 (4) 16 (6) 25 (9) 20 (16) 14 (27)  
Localization          < 0.001a
  Right colon 845 (55) 166 (47) 232 (51) 174 (62) 158 (59) 79 (64) 36 (69)  
  Left colon 685 (45) 187 (53) 219 (49) 107 (38) 111 (41) 45 (36) 16 (31)  
Stage (TNM)         0.14d
  I 189 (12) 42 (12) 61 (14) 34 (12) 34 (13) 15 (12) 3 (6)  
  II 582 (38) 127 (36) 160 (36) 117 (42) 101 (38) 47 (38) 30 (58)  
  III 331 (22) 78 (22) 120 (27) 62 (22) 54 (20) 12 (11) 5 (10)  
  IV 377 (25) 102 (29) 102 (23) 60 (21) 66 (25) 35 (27) 12 (23)  
  Unknown 51 (3) 4 (1) 8 (2) 8 (3) 14 (5) 15 (12) 2 (4)  
Treatment intent categories          < 0.001c
  Curative intent
    Major resectionf 1034 (68) 239 (68) 328 (73) 204 (73) 172 (64) 67 (54) 24 (46)  
    Polypectomy 38 (3) 10 (3) 11 (2) 11 (4) 6 (2) 0 0  
  Non-curative intent
    Major resection 220 (19) 62 (18) 64 (14) 39 (14) 38 (14) 14 (11) 3 (6)  
    Bypass/stoma 67 (4) 17 (5) 17 (4) 6 (2) 14 (5) 11 (9) 2 (4)  
  Best supportive care 171 (11) 25 (7) 31 (7) 21 (8) 39 (15) 32 (26) 23 (44)  
    Surgery         0.005b
    Elective surgerye 1081 (82) 263 (83) 339 (83) 217 (88) 176 (79) 72 (78) 14 (48)  
    Emergency surgery 240 (18) 55 (17) 70 (17) 32 (12) 48 (21) 20 (22) 15 (52)  
  1. Values are the number of patients (%), unless otherwise indicated. aCochran-Armitage exact trend test; bOrdinal logistic regression with age group as covariate; cMultinomial logistic regression with age group as covariate
  2. dOrdinal logistic regression with age group as covariate, for known stages; eIncluding polypectomy; fIncluding R0 resection, R0 resection with perforation and R1 resection