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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
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